Mailbox providers

1. Open an email from the sender you want to whitelist.
   
2. Click the from/sender address in the top of the email.
   
3. Click Add to contacts or Add to safe senders' list.
   

AOL

1. Log in to your AOL account.
   
2. Open an email from the sender you want to whitelist.
   
3. Click the sender name and a drop down will pop up.
   
4. Click Add Contact.
   

Gmail

1. Log in to your Gmail account.
   
2. Open an email from the sender you want to whitelist.
   
3. Hover over the sender's name and a window will pop up.
   
4. Click Add to contacts to save the sender in your contact list. Alternatively, you can add click the More button on the right side of the email and click Add to contacts.
   

Zoho Mail

1. Login to your Zoho Mail account.
   
2. Open the email from the specified sender.
   
3. Click on sender name from the email.
   
4. Click Add to contacts that appear.
   

Outlook

1. Log in to your Outlook account.
   
2. Open an email from the sender you want to whitelist.
   
3. Click More actions (down arrow) in the top right.
   
4. Click Add to safe senders.
   

Yahoo! Mail

1. Log in to your Yahoo! Mail account.
   
2. Click on Settings on the right end of top menu.
   
3. Click More Settings.
   
4. Click Filters.
   
5. Click Add new filters.
   
6. Add sender details and choose Inbox as the folder to deliver the email in.
   
7. Click Save.
   

Orange.fr

1. Log in to your Orange.fr account.
   
2. Open an email from the sender you want to whitelist.
   
3. Click add to my contacts option in right menu.
   
4. Click add button.
   
5. After adding a sender address, you can view your contacts in contacts menu. You can also add a new address by clicking on  create a contact  option in  contacts  section.
   

iCloud Mail

1. Log in to your iCloud account.
   
2. Click Mail in the top menu and choose Preferences.
   
3. Click Rules from the dialog box that opens.
   
4. Click Add Rule button on the right side of the dialog box.
   

Mail.ru

1. Log in to your Mail.Ru account.
   
2. Open an email from the sender you want to whitelist.
   
3. Click the Yet dropdown from the menu above your email.
   
4. Select Add to.
   

Rediffmail

1. Log in to your Rediff account.
   
2. Open the email from a specified sender.
   
3. Click add to address book (which is beside the from) to save the sender in your contact list.
   

Web.de

1. Log in to your Web.de (Freemail) account.
   
2. Click Settings (Einstellungen) option in the bottom-left corner of the page.
   
3. Click Desired List (Erwünscht-Liste) from the list of options.
   
4. Enter the desired email address or domain.
   
5. Click  Save.
   

Comcast.net

1. Log in to your XFINITY (Comcast.net) account.
   
2. Open an email of the sender you want to whitelist.
   
3. Click on the sender email address from the email.
   
4. Click Add to address book.
   

Freenet.de

1. Log in to your Freenet.de account.
   
2. Click Settings in top menu bar.
   

Mail.com

1. Log in to your Mail.com account.
   
2. Open an email of the sender you want to whitelist.
   
3. Click the plus symbol beside the From: in the email.
   
4. Fill details like first name and last name.
   
5. Click OK button.
   

GMX mail

1. Log in to your GMX mail account.
   
2. Open an email of the sender you want to whitelist.
   
3. Click the  plus  symbol beside the From: in the email.
   
4. Fill details like first name and last name.
   
5. Click OK button.
   

Yandex

1. Log in to your Yandex mail account.
   
2. Open an email from the sender you want to whitelist.
   
3. Click on the sender's name. A pop-up box will appear.
   
4. Click Add to contacts.
   

BellSouth/AT&T Webmail

1. Log in to your BellSouth/AT&T Webmail account.
   
2. Open an email from the sender you want to whitelist.
   
3. Click the sender's name and a window will pop up.
   
4. Click More icon at bottom right corner to save the sender in your contact list.
   
5. Click Add to contacts that appear.
   

Telekom

1. Log in to your Telekom (t-online.de) account.
   
2. Right click the email whose sender is to be made a contact.
   
3. Select Into the address book option from the drop down that appears.
   

Barracuda

1. Log in to your Barracuda account.
   
2. Click Email Security in the left menu and choose Inbound Settings.
   
3. Click Sender Policies.
   
4. Enter the sender domain, choose Exempt for Policy, and click Add.
   

Trendmicro

1. Log in to your Trendmicro account.
   
2. Click Inbound Preferences from the top menu.
   
3. Click Approved Senders under Sender Filter.
   

Antispamcloud.com

1. Log in to your antispamcloud.com account.
   
2. Click Sender Whitelist under Whitelist/Blacklist from the left side menu.