You can get the email you want by whitelisting an email address with Gmail, Outlook.com, Yahoo! Mail, Aol or MSN. This guide explains how to do that. 

Why you are not receiving the emails

Services like Gmail, Outlook.com and Yahoo! Mail block email to protect you from unwanted or malicious email such as phishing, scams and spam. In this case, they are mistaking email that you want for email that you don’t want.

If you ask your email provider to unblock or whitelist an email address, email from that address will be more likely to get through. Here is an explanation of how to do that for Gmail, Outlook.com or Yahoo! Mail.

How to whitelist an email address with Gmail

Sign in to your account at Gmail.com and do the following.

Add the address to your contacts

Add the email address that is sending you email (eg support@onlinegroups.net) to your Gmail Contacts. Google will usually deliver email from addresses that are in your Contacts.

Mark messages as ‘Not spam’

If Gmail has marked emails you wish to whitelist as spam, tell Gmail the emails are not spam.

1. In Gmail, navigate to the spam folder.
2. Search for emails containing the domain you wish to whitelist (eg onlinegroups.net).
3. Select all the emails shown.
4. Click More and then Not spam.

Create a filter for the address

Create a filter to tell Google to whitelist email from a domain or online group.

1. Click the cog icon in the top-right corner, and then Settings
2. Click on Filters and then Create a new filter
3. Either
   • enter the domain of the email you want to whitelist in the From field or
   • enter the email address of the online group you want to whitelist in the To field
4. Click Create filter with this search
5. In the box headed When a message arrives that matches this search select Never send it to spam
6. Click the Create filter button

To whitelist all email from a domain, enter the domain in the From field

To whitelist an online group, enter the group email address in the To field

Tips:

• Do not enter email addresses in both the From and To fields as Gmail will only filter in emails that meet both criteria
• In both the From and To fields, you can enter either a specific email address or an entire domain
• To enter multiple domains in each field separate them with OR as in “onlinegroups.net OR groups.yahoo.com”

How to whitelist an email address with Outlook.com

For Outlook.com, Windows Live Mail, Hotmail and MSN Mail, sign in to your account at Outlook.com and do the following.

Add the address to your contacts

Add the email address that is sending you email (eg support@onlinegroups.net) to your Outlook.com Contacts. Outlook.com will usually deliver email from addresses that are in your Contacts.

Add the address to your safe senders

1. Click the cog icon in the top-right corner and then More mail settings
2. Select Safe and blocked senders and then Safe senders
3. Add add the domain of the email you want to whitelist to the list of Safe senders
4. Return to Safe and blocked senders and then select Safe mailing lists
5. Add the email address of the online group you want to whitelist to the list of Safe mailing lists

To whitelist all email from a domain, add the domain to the list of safe senders

To whitelist an online group, add the group address to the list of safe mailing lists

Tips:

• In both the Safe senders and Safe mailing lists, you can enter either a specific email address or an entire domain
• In both the Safe senders and Safe mailing lists, you can enter multiple domains or email addresses

See also Outlook.com’s help on I didn’t receive an email someone sent me.

How to whitelist an email address with Yahoo! Mail

Sign in to your account at Yahoo! Mail and do the following.

Add the address to your contacts

Add the email address that is sending you email (eg support@onlinegroups.net) to your Yahoo! Mail Contacts. Yahoo! will usually deliver email from addresses that are in your Contacts.

Create a filter for the address

1. Mouse over the Settings menu icon and select Settings
2. Click Filters and then Add
3. Enter a Filter Name
4. Either
   • enter the domain of the email you want to whitelist in the Sender field, or
   • enter the email address of the online group you want to whitelist in the Recipient field
5. Select Inbox as the folder to deliver the email to
6. Click Save and then click Save again

To whitelist all email from a domain, enter the domain in the Sender field

To whitelist an online group, enter the group email address in the Recipient field

Tips:

• Do not enter email addresses in both the Sender and Recipient fields as Yahoo! Mail will only filter in emails that meet both criteria
• In both the Sender and Recipient fields, you can enter either a specific email address or an entire domain
• Create a new filter for each domain or email address you want to whitelist

*This is a copyright to http://onlinegroups.net/blog/2014/02/25/how-to-whitelist-an-email-address/*

How to whitelist an email address with Aol

You must add the email address or corporate domain of the sender to your address book or custom sender list to make sure email gets delivered to your AOL inbox. 

• First, click on the "Spam Controls" link on the lower right side of your inbox screen.
• A "Mail and Spam Controls" box will appear.
• Now click on the "Customer Sender" list link and choose the "Allow email from ..." option.
• Enter noreply@taxcaddy.com, then click "add" and "save." 

In more recent versions of AOL, you can also simply add the name of the sender to your Contacts list. AOL will then recognize that this is someone you want to communicate with. Just click on the sender's email address. A menu should drop down. Select "Add Contact." 

Whitelisting Senders and Domains Using AOL WebMail

Replying to an email from a sender you want to whitelist will automatically add the list as a safe sender if you're using AOL webmail.

Email from that domain will then be delivered straight to your inbox. The software will recognize that it's not spam. 

How to whitelist an email address with Hotmail, MSN

There are two ways to whitelist emails in Hotmail Live, Windows Live and MSN.

Check the Junk Folder

If an email from a sender you want to whitelist has ended up in your junk folder, the process is simple.

• Click "Show Content" to view the body of the email.
• Click "mark as safe".

The sender will be added to your list of safe senders and all future emails will go to your inbox. 

Manually Add the Sender to Your Safe List 

If an existing email from the sender hasn't already been trapped in your junk folder, you can manually add him to your Safe List.

• Click on "Options" in the upper right corner of your Hotmail screen.
• Then click the link for "Safe and Blocked Senders" in the body of the page under Junk e-mail.
• Click the "Safe Senders" link and enter the email address you want to whitelist.
• Click "Add" to put it on your list.

*Copyright to https://helpcenter.taxcaddy.com/hc/en-us/articles/360000085567-Updating-your-Safe-Senders-list-in-Hotmail-Windows-and-MSN*

and copyright to * https://helpcenter.taxcaddy.com/hc/en-us/articles/360000083367-Updating-your-Safe-Senders-list-in-AOL *