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Tuesday, 16 December 2014

Yahoo Mail Spam Filter Not Working on PC, What Next

Yahoo Mail spam filter not working on computer system! If truth be told this is actually a very terrible situation. The reason being that in such a situation all the Spam emails escape from Spam Filter and gets dumped in Inbox along with the important emails. Moreover, when the spam emails are in bulk it indeed creates a more difficult situation as users find it tough to differentiate and then delete multiple spam mails from the Inbox folder in which the received emails are stored.
This might be due to quite a few reasons and therefore, this article aims at suggesting ways to filter out spam messages in the Spam folder only. And this can happen only when Spam filter of Yahoo Mail, an emailing service by the IT giant Yahoo works. Though it filters the suspected spam mails automatically on its own and moves them to the Spam folder instead of Inbox, sometimes the undesired email messages become successful in making their way through it.

Techniques to Stop Spam in Yahoo Mail Inbox Folder


Different techniques can obviously be applied for stopping or reducing spam when the condition is: Yahoo Mail spam filter not working on computer machines. The methods that can be brought in use to fight back spamming is described in this section and that is as below:
  • Tabs ‘Spam’ and ‘Not Spam should be made use of.
  • Email filters must be set up in the emailing service.
  • Suspected sender’s email addresses must be blocked.
  • Images must be restricted from being displayed in emails.
Method 1: By usage of ‘Spam’ option
Yahoo Mail works all round the clock to keep its users un-affected from spam emails but even though when Spam filter is not working as a result of which spam emails get collected in Inbox, users should report the same by marking the particular email(s) as Spam. On doing the reported spam email gets moved into the Spam folder instantly without delay. This gives experts at Yahoo a shield to battle against unsolicited email messages in future. Moreover, if it is further realized that the message(s) is not spam then by selecting the message and clicking on the option Not Spam, it can be transferred into the Inbox again as per requirement.
Steps Involved
  1. Select the checkbox located next to the email(s) that are spam.
  2. Then click Spam option.
Finally, in this way the mails get transferred to Spam folder.
Method 2: By applying filter rules in Full Featured Version
Filters can be setup by the users to direct incoming mails into respective folders. This is because by the help of rules, filters acquire the ability to sort out emails as per want of the user. Setup of about 200 filter options is possible in Yahoo Mail including the rule to select destination where the incoming mail must be saved e.g. Spam folder in this case, can be created. However, it is not possible to create filters in the Basic Mail interface of Yahoo Mail service. But the good thing is that filters created in the ‘Full featured’ release are active on the Basic Mail release. Therefore, the users of Basic Mail can migrate to the newer edition; create spam filter and then changeover back to older release. Moreover, when required the applied spamming rules can be erased as well.
Process to Apply Filter
At first the filters must be made accessible and for that the following steps get necessary.
  1. In the section Settings, the option Filters should be clicked upon.
  2. On doing so the Filters settings appear in Yahoo Mail.
Note - Thereafter, the filter should be created for which the below mentioned steps should be followed in the exact sequence as mentioned.
1) In the Filter screen click the option ‘Add’ and put in the name of the filter.
2) Then fill in the fields of filter such as given below:
  • Sender i.e. one who sent the mail
  • Recipient i.e. account’s own email id
  • Subject i.e. the text part within the subject of the received email
  • Body i.e. the text portion of email body
3) Either select a folder or create one to store the affected email messages and click the Save option.
4) Again, click Save to go back to emails.
Finally, in this way only the messages that match the set criteria shall get delivered directly to the selected folder.
Method 3: By blocking unwanted sender(s) Mail Ids
The other method to restrict the incoming spam messages in the Inbox folder is to block such addresses. By blocking the addresses users can avoid the unwanted mail messages from being received. In this way the situation of ‘Yahoo mail spam filter not working’ can be avoided and only the mails from wanted senders can be left unblocked. In Yahoo, a maximum of 500 email addresses can be blocked to avoid spam messages. Moreover, if required the blocked email id’s can be unblocked too. However, the prescribed steps should be followed to block/ unblock messages by specific sender(s).
Instructions for Blocking Email Id
  1. Log into Yahoo Mail account
  2. Click the ‘Settings’ icon.  
  3. Then select the settings tab.
  4. Thereafter, click on tab Blocked Addresses.
  5. Enter the mail id in ‘Add an address’ field.
  6. At last click the option Block which is the last step.
Finally, in this way the required email id from which chances of receiving spam mail exists gets blocked.
Method 4: By restricting images in incoming emails
Not displaying images in the incoming emails is also one of the successful methods to fight back spam. This is because blocking images prevents the affirmation ‘hits’ that spammers receive even if one of their images gets viewed by account holders of Yahoo Mail. Hence, for preventing images from being displayed some kind of image settings needs to put on. Moreover, on need the reverse can also be implied i.e. the restriction on images from getting displayed can be removed. The guidelines that should be followed to prevent images from getting presented are mentioned below in a stepwise manner. 

Directions for Preventing Images from Getting Displayed
  1. Open Yahoo Mail account.
  2. Go to Settings menu, a gear like icon.
  3. On bringing the mouse on the icon, number of tabs appears.
  4. Thereby, click on the Settings tab.
  5. Then click upon Security tab.
  6. Then from the drop-down menu ‘Show images in emails’ choose the option Never by Default or Always, except in Spam folder.
    Note – The former is indeed the safest option.
  7. At last, click the option Save.
Finally, in this way the image display settings can be changed to restrict ‘display of images’.

Useful Tips at a Glance for Avoiding Spam in Future
Yahoo Mail users should indeed follow some tricks to avoid the situation of: Yahoo Mail spam filter not working and they are as follows:
  • An unwanted email should never be responded to.
  • To stop unsolicited spam message(s) they should never be responded with the word remove, erase or any similar word.
  • Displaying email addresses at public places or online directories must be avoided.
  • Even the sites that assure to remove name from spam lists must not be signed int. This is because though there are few genuine sites, many of them are id collectors used by spammers for spamming purpose.

Tuesday, 9 December 2014

Mail Server Protocols Used in Outlook Express

A Server is a computer program which serves the request of other programs. It is a running instance of an application. It has the capability to accept requests from the client and give response. A server operates in a client server architecture. When a client gets connected to a server, they communicate through protocols. A protocol is a set of instructions to do a certain task. In email servers, four protocols are used. 

They are POP3 (Post Office Protocol version 3), SMTP (Simple Mail Transfer Protocol), IMAP (Internet Message Access Protocol) and HTTP (Hyper Text Transfer Protocol). Amongst a large number of different email clients, Outlook Express supports all the four protocols. Although, the above mentioned protocols perform a mail function each, but a slight difference can be noticed in their working.

 

Get Detailed Information About All Mail Servers


1) POP3 Server: It is used to retrieve mail from the server.  It stores email on the server until it is downloaded. The client server deletes the message once it is downloaded. A mail once downloaded will not be opened again on any other system. It provides security to our mail.  In Outlook Express this protocol is followed, but an additional option is provided to ‘leave a copy of the message on the server’. Mails of the POP3 server cannot be recovered easily as there is no copy of the mail on the server. If we need to recover a file from POP3 server, a software will be required to perform the task.

2) SMTP Server: SMTP is a connection oriented protocol. It is used to send emails through the server. It is purely based on ASCII text. It does not deal with the binary files or character. An SMTP transaction consists of 3 command or reply sequences; MAIL (mail), RCPT (recipient), and DATA (data).

3) IMAP Server: They are used to retrieve mail from the server. The mail is permanently stored on the server. Using IMAP server, we can access our mail from any interface. The security level for IMAP server gets a bit degraded as the mail gets permanently stored on the server. However, the brighter side of customizing the settings is that in case email gets corrupted, then we can recover it easily as a copy of it will always be present on the server. 

4) HTTP Server: The HTTP server does not use the undeleted or purge functions. Deleting a message moves the message to the deleted message folder and it can be retrieved from there. It can be retrieved by directly dragging it to the inbox or some other folder. The deleted items get deleted only after a definite or fixed time automatically, also known as the retention period of permanently deleted emails.

Friday, 28 November 2014

Top 5 Methods to Take Backup of Hotmail Account


Hotmail is an online email service provided by Microsoft. It saves all your emails into a cloud server of Microsoft. So if a user wants to save same emails in his/her end, then he/she can take backup of hotmail account to hard drive. After  seeing the importance of email backup, most of the users start wondering a solution for how to take backup of hotmail account. So  five different methods  are discussed in this post that can be used by a user for backing up a hotmail account.

1). Use Outlook Express to Backup Hotmail Emails :-

If you are using Windows XP, Then you can back up your hotmail account with the pre-installed application Outlook Express. It is the email client, attached to the Windows XP package. So if you are using Windows XP then it may be the best solution to back up your Hotmail account is backup hotmail using outlook express.

Steps for How to Take Backup of Hotmail Account using Outlook Express:-

  • Login to your Hotmail account in the Outlook Express, by entering an email id and password
  • Wait until Outlook Express application download your mails
  • After completion of the downloading process, click on the File option from the menu bar and click on the New backup option or directly press Ctrl + N.
  • Now Enter the name that you want to give to your backup file.
  • Now select the location where you want to save your file and click Next.
  • Now click on the Selection of files and folders and select Outlook express.
  • You will see a complete list of items to be backed up. You can Uncheck any of items if you don’t want to back up and click on that next.
  • Now save the file.
Outlook Express saves your backup files into the .dbx format. And if want to use the backup into the MS outlook or Thunderbird you need to convert it into the corresponding format. So you can directly use MS outlook or thunderbird to backup hotmail account into desired format.

2) Backup Hotmail using Outlook:-

If you have MS outlook installed on your machine, then you can use it to back up your account directly into the .pst format.

Steps for how to Take Backup of Hotmail Account using MS Outlook:-

  • First, enter Email Id and password to the MS outlook application and configure your hotmail account properly
  • Now click on send/receive button and wait for a time until MS Outlook download your Emails
  • As the downloading process completes, you will get all your emails in a PST file
  • The default location of PST file is totally depending on Windows OS and MS Outlook editions
MS Outlook save the backup file into the PST format. If you want to use it into the thunderbird then you need to convert it into the mailbox format. The MBOX file format is supported by many of the email client. If you have thunderbird Email client you can directly use It to back up your emails into the .MBOX format. Thunderbird is the open source application you can download it from the internet.

3) Backup Hotmail using Thunderbird:-

Thunderbird is a free application and anyone can download the application if it is required from the internet. Thunderbird backup your emails into the .mbox  file format. The mbox file format is supported by most of the email client. So one of the best application to backup your account is by using the Thunderbird application.

Steps for How to Take Backup of Hotmail Account using Mozilla Thunderbird:-
  • Install Thunderbird on your computer and provide login details to configure Hotmail account.
  • Select the POP3 button and click on create account.
  • Wait until the process of downloading the email completes
  • Now you need to install free add-on Import Export tool in the Mozila thunderbird application
  • After installing the application will be available into the tool option, click on it and backup hotmail using thunderbird.

4) Backup Hotmail account using windows mail :-

If you are using Windows 7 you can use the window mail client to back up your emails. Window mail will save a  backup of your email in the EML format. EML format is also supported by many of the email clients.

Steps to Backup Hotmail Account using Windows Mail:-

  • Open windows mail and enter logging details
  • Now click on export mail and then click on email messages.
  • Now select the Microsoft windows live mail option and click on the next.
  • Now select the destination where you want to store the file
  • Click on Next Next and then finish

5) Use a Paid Tool to Backup your Emails:-

If you are not able to backup your emails using above suggested methods, then you can use a paid tool to backup your hotmail account. Paid tools are easy to use and creates a backup of the emails into desired format within a few clicks. There are many such applications and Hotmail backup software is one of the best tool that I have experienced for the same. A lot of useful features are available in this application that make tasks easier. Just download a free version copy of the tool to have a trial.

Conclusion:-

Solution  of how to take backup of hotmail account given above may be enough for the user to take backup of Hotmail account. In case if the user is finding any difficulty, please comment we will respond as soon as possible.

Thursday, 16 October 2014

How to Backup Gmail using Outlook and Mozilla Thunderbird

Take Gmail Backup in a Folder on Hard Drive

Today, Many of us use Gmail for sending/receiving our personal as well as our professional mails. Gmail also let us to store contacts, notes and tasks. Even though Google provides high security, it happens that you delete your important emails by the mistake or due to few security attacks. But don’t be panic here is solution “How to Backup Gmail using Outlook, Thunderbird or other Desktop Clients”.

Why we Need Gmail Backup

There are many reasons to backup your Gmail accounts. Some are following:
  • If the Google mail server goes down and you need your email or attachments urgent basis, for this if you have Gmail backup then you directly see them.
  • It is always possible that your data may be removed due to Gmail server issue, so for important data like passwords, contacts, addresses and attachment you need to backup a replica of data to your local machine.
  • If you delete your important data by chance and need this information for future use, then there is also need Gmail backup your data somewhere else Gmail Cloud.
If you're anxious about ever losing your Gmail emails, it's probably a good idea to regularly backup your Gmail account by configuring a desktop email client on your PC.

So there are many ways to recover your data from any disaster happen on Gmail cloud. For this you need a desktop client (Thunderbird, Outlook etc). You need to some setting change to your Gmail account. Below is step by step process to backup your data :

Step 1: Log in your Gmail account.
Step 2: Go to Settings and click settings.
Step 3: Locate to Forwarding and POP/IMAP.
Step 4: Go to POP download and click Enable POP for all mail (even mail that's already been downloaded). 
Step 5: Go to IMAP Access and Enable the IMAP. 
Step 6: Click to save changes.

How to Backup Gmail using Outlook, Thunderbird:

Now you need to install Mozilla Thunderbird, Microsoft Outlook or any other email client on your desktop. After that the steps are:

 

Steps for How to Backup Gmail with Thunderbird

Step 1: Open Thunderbird. 
Step 2: Enter your Gmail user id and password. 
Step 3: Thunderbird download your email. 

Note: Thunderbird doesn’t backup your Sent Mail folder. 
If you want to take Gmail backup of all folder, Microsoft provides you an Email Client i.e. Microsoft Outlook. You can install it then configure different setting for backup your Gmail data. Here are the steps to do this :

Stepwise Guide on How to Backup Gmail using Outlook

  • From your desktop, click Start.
  • From the Start menu, click Microsoft Office Outlook.
  • From the top taskbar, click Tools.
  • Select Account Settings.
  • From the E-mail tab, click New.
  • Select Microsoft Exchange, POP3, IMAP, or HTTP and then click next.
  • The Auto Account Setup screen is displayed. Check the manually configure server settings or additional server types check box.
  • Click Next.
  • Select Internet E-mail and then click next.
  • The Internet E-mail Settings screen is displayed. Type the following information:
    • Your Name: The name that will be displayed to recipients of your sent email
    • E-mail Address: Your gmail.com email address
    • Account Type: Select POP3
    • Incoming mail server: pop3.gmail.com
    • Outgoing mail server (SMTP): smtp.gmail.com
    • User Name: Your email account username
    • Password: Your email account password
    • Check the Remember password check box.
    • Click More Settings.
    • Under the Outgoing server tab, place a check mark in the outgoing server (SMTP) requires authentication checkbox.
    • Under the Advanced tab, edit Outgoing server (SMTP): to 1025.
    • Click OK.
    • Click Next.
    • Click Finish.
Your gmail.com email account is set up for use with Microsoft Office Outlook 2007.


NOTE: you can also use IMAP instead of POP3.They both are same with little difference i.e. if you use POP3 , you can access your email only from one machine and if you make change in your machine , on server no change .While by using IMAP you can check them from multiple device. But with IMAP, if you delete or change in your email, change directly on server. No recovery is possible with IMAP. 

Note: POP3 create a copy of your mail data in your machine but IMAP does not allow downloading server data to PC. So generally POP3 server is preferred by users for backup purpose.

In this way you can take Gmail Account Backup on your machine. Now your all Gmail data in your hand, use it whenever need.

What if you don’t want to Use Desktop Email Clients?

There is another way to backup your Gmail data using a commercial Gmail Backup Tools provided by many software companies. As per my own experience I would like to suggest you to use SysTools Gmail backup tool. Free demo version of tool is available to take a trial. 

Saturday, 11 October 2014

Know How to Add Signature to Yahoo Mail Account

Usually users provide information regarding them at the end of an email that is identified as Email Signature.  Yes of-course, it’s true that a signature may be a valuable aspect of your communication. So, an email signature can be in the form of your full name, your contact information, your business name, a private notice, or even a saying that is related to you.

By providing your essential contact details with the signature, the receiver feels less uncertain about contacting your company. So, this way you can easily promote your brand globally.

What’s The Need to Add Signature In Yahoo Mail?

As we all know that adding same details again and again in the signature is a bit time consuming. It also irritates a user and makes them think about how to add a signature to a Yahoo mail account. So if you desire to send Yahoo emails with a common ending signature every time, then you can simply add a Yahoo Mail signature by following the few easy steps listed below.

Simple Steps to Insert a Signature in Yahoo Mail!

Step1: In the very first step, log on to your Yahoo Mail account using appropriate credentials.


Step2: Go to mail section by clicking on “Mail



Step3: Click on the "Gear" on the top right corner, next to your user name >> and choose "Settings”.


Step4: Now click on the "Writing Email" tab available under the Settings section.

Step5: Choose "Show a rich text signature" option from the dropdown list.


Step6:
Enter a desired signature (text, hyperlinks, image, and contact details, etc.) in the empty box and click on Save to implement the settings.


Note: By following above listed steps you can add a signature to your Yahoo mail account. It will surely help you save a lot of precious time in writing the same signature details, again and again.

Monday, 29 September 2014

Know How to Save Gmail Emails as PDF Format

Gmail email application is a world-wide used application and is highly reliable service. It might not be wrong to say that every person who is active on internet has at least one email account on Gmail and of course the emails belonging to this account are very much important. So what makes Gmail so popular? If you too are a dedicated user of Gmail, then the answer must be known to you. The very first thing is it is FREE of cost and provides massive storage capacity. Web-based email application and hence is anywhere-functional. Functions like labels, filters, multi-star-flags, Google-labs, fast-search, etc. makes Gmail a smart application for smart users.

But does this application lets you access emails offline? Or does it provide you guarantee of not losing your data saved on cloud? Unfortunately Gmail service fails to do so and hence it’s your responsibility to take care of our important email data.

Why is Cloud not Safe for Crucial Data?

Data saved on cloud has its own benefits but the loopholes in technology helps hackers to play with your crucial data. Many such incidents have happened earlier also which made many users to lose the email data. Accidental deletion, malware attacks, sync-errors, user-error, etc. are other reasons which can cause permanent email data loss. In such situation it will not be wise to take chances with your emails and hence generates a need to save emails on local drive so that your emails are safe with you.

How Can Saving Email as PDF File Protect It?

PDF file format also known as Portable Document File has its own advantages. This file is not only a printable and most popular file format. It also allows you to protect the data inside by applying passwords in it. The email data is intact and can be saved in your local hard drive and your email can be accessed without any internet connection also. You can also send this email via attachment to other users with a password applied on it so that its misuse is checked.

Procedure to Save Email as PDF File:

Just to be on safe side you can utilize the inbuilt functionality of converting emails to PDF files to safeguard your emails. You will not require taking a snapshot of your email and your complete email will get converted into PDF file. No need of downloading any external software or tool for this conversion. You just need to follow the following procedure;

Step 1: Log in your Gmail account whose email you want to convert to PDF.

Step 2: After successful log-in, open the email (You can also open this email in separate tab if you want).

Step 3: Now go to right extreme of that email, you will be able to see many options.


Step 4: Click on “Print Icon” or go to the drop-down menu and choose “Print” option.


Step 5: Now another window will open with Print details. Remember that you need not to print the email, you just want to save it as PDF file. Here check the Destination option. In case it shows other details like your printer name click on Change option.


Step 6: Now you will get more options, here go to the option of Save as PDF in this window as shown below. 



That’s it! Now you have your important email as a PDF file saved in your hard drive. PDF file with single email data hardly takes memory space and hence can be saved anywhere you want to. You can perform same procedure with other emails also one by one a there is no inbuilt facility available to save your emails in bulk as PDF file. This might take time but your emails data will be always safe with you. In case you want to save all emails in your hard drive then you will need some external help. Many third party tools like Gmail Backup tool provide service to backup all the emails of your Gmail account. It will help you save all the emails instead of wasting time in saving email as PDF one by one.
 
Conclusion:.

The method mentioned above is a smart technique of saving important and confidential emails as PDF files if you want to save few emails. However if you need to save all the emails then you will have to make a wise decision to safeguard your emails through better means.

Friday, 26 September 2014

How to Activate Gmail’s 2-Step Verification on iPhone and iPad?

Security of the Gmail account is a prime concern for every user, where no one wants to compromise.  Users can use many security methods to experience a secure emailing process on the Gmail account and prevent hackers from stealing confidential information from their precious emails. But out of all the methods, Gmail 2-step verification is the best and most popular way to ensure the safety of your Gmail account. Before moving on to knowing how to activate Gmail’s 2-Step verification, we will discuss something about this popular method.

What is Gmail's 2-Step Verification?

2-Step Verification is an extra layer of security provisioned by the Google authority to protect your Google Account from hackers. It not only requires your password, but also a pass code that is shared with you on your phone via text or voice. 
To break into an account having 2-Step Verification, hackers would not only have to know your username and password, they'd also have to get a hold of your phone. When a user setup this security layer on his Gmail account, then no one can directly sign into their Gmail account. The act can’t be carried out even when your account credentials are known because during login, Gmail will send a code to your cell phone that you need to verify.

How to Active Gmail’s 2-Step Verification on iPhone?

It is very simple to activate 2-step verification on your iPhone. You will have to follow only a few simple steps to do this and no additional efforts or technical skills required.

Step1: In the very first step log into your Gmail account >> Now visit Gmail's 2-step verification settings page
Step2: Click Start Setup button.

Step3: Select your country and provide the cell phone number in which you wish to receive the verification code >> Now choose Text or Voice call to receive verification code.

Step4: Get code and enter it.

Step5: Read info about 2-step verification >> Click Confirm.
 
Step6: Now 2-step verification is activated successfully.
 
How to set-up Passwords for iPhone with Gmail's 2-step Verification?

Once Gmail 2-step verification has been activated on your iPhone, you will instantly notice that all mail clients along with iPhone, MAC and iPad, start providing you wrong password errors. Don’t worry; this is a good sign because it means that your activation was a success. You have to generate a separate password to access Gmail from your iOS and Mac mail clients.

Step1: Login to your Gmail account

Step2: You will directly be taken to screen that details you about 2-step verification activation and provides you with further options. Choose "Application specific passwords">> Click the Manage application specific passwords, link in the lower right corner.

 

Step3: Provide a name to the password you're creating. Be as specific as necessary and make sure you give each device a separate name like "Zora's iPhone" and "David's iPhone”.


Step4: Click Generate Password.


Step5: Instantly enter resulting code into your iPhone's Mail Settings as shown below:

Go to Settings > Mail, Contacts, Calendars > Accounts. Do not enter any spaces.


Note:  Repeat steps 4-5 for Mac, iPad and any other devices to access your Gmail account.

Conclusion: In this post, you can clearly know how 2-step verification important and how it works on the iPhone. All possible ways are described here that will surely help you on how to activate Gmail’s 2-step verification on iPhone.

Tuesday, 23 September 2014

Know How to Block Sender in Yahoo Mail On iPhone

The blog is an attempt to reveal the process as how to block sender in Yahoo mail on iPhone. The modern day mobile phones like iPhone, Samsung, Blackberry, Android etc. that can be generalized in a common term named smart phones; not only facilitates users with calling and messaging amenities but also offers emailing service from almost all top class email service providers such as Gmail, Yahoo Mail, Hotmail, AOL and many more, anywhere and everywhere irrespective of the location as to where they are. This is because people carry their phones to all places wherever they visit. Users can link the most commonly used web mail addresses of the above foretold email services to their smart phone and can send and receive mail in the same way as they do on the web. 
 
Similarly, iPhone users can make a link to their iPhone’s mail app so as to read and compose emails to and from different id’s straight away from the smart phone. But as the famous saying goes that every coin has two sides one good and the other bad, same is the case when users link their email addresses with iPhone’s mail app. One drawback that Yahoo users on iPhone might usually face is that they get flooded with number of unwanted mails or spam from a specific sender. At such times it gets essential to block sender in Yahoo mail on iPhone.

Ways to Block Sender in Yahoo Mail on iPhone

This can be done in two ways; either by blocking the sender from the Yahoo Mail account or by blocking email address on iPhone.

1. Block Email Address on Yahoo Mail
Step 1: Sign in to your Yahoo! Mail Account by typing in the email ID and password at defined location as shown in red color in the figure below. 

  
Step 2: Click the gear icon located at the top right corner as shown in red rectangle in the image below and then click the tab ‘Settings’ (shown with red arrow mark) in the menu that appears.

  
Step 3: Then, another window called ‘Settings’ appears that has a tab named ‘Blocked Addresses’ as shown in the figure below. The button ‘Block Addresses’ should be clicked. 

  
Step 4: On doing so another window as shown below appears. In this window the email addresses that need to be blocked should be typed in at the space beside the tab ‘Add an Address’. Then the button ‘Block’ should be clicked and finally the ‘Save’ tab located at the bottom left corner should also be clicked. The tabs are shown in red rectangle and the blocked addresses are shown in the space provided below.
Note – It should be noted that a maximum of 500 email addresses on one account can be blocked. All messages received from the blocked sender’s gets immediately deleted and doesn’t bounce back as undeliverable.
Finally, in this way the mails from specific sender(s) can be blocked in Yahoo Mail.

2. Blocking Email Address on iPhone be it On Your Yahoo Account or Any Other
This can be divided in two segments that are addition of the email address to Contact List in the iPhone and then blocking the unwanted email ids.
Segment 1: Addition of Email Address to Contact List on iPhone
Step 1: Launch the iPhone’s Mail application and then tap the Mail app from iPhone’s home screen to open it.
Step 2: Open a message from a particular unwanted email address that is to be blocked. Once the Mail app is opened, tap the message that came from the specific id that is to be blocked.
Step 3: Then view the sender details and to do this tap the mail id displayed on ‘From’ field which is located at the top of the screen.
Step 4: Then create a new contact and tap on ‘Create New Contact’ which is located on the window showing sender details. On the following screen, a name for the contact to be blocked should be typed in.
Note - Before blocking an email address on an iPhone, the id should first be saved in the contact list or else it won’t be possible to block it. Therefore, a new contact should be created for the email id to be blocked.
Step 5: Then the email address should be added to the contact list. Then tap ‘OK’ at the bottom of the screen so as to add it to the contact list of iPhone.
Segment 2: Blocking the Email Address
Step 1: Go to settings of iPhone and select the ‘Phone’ option.
Step 2: This displays the settings of the phone like the respective phone number, voicemail and many others.
Step 3: From the list of options tap ‘Blocked’. Here, the contact details like phone number or email addresses can be added that is to be blocked on the phone.