Junk filters help keep your email in-box clear of spam and other unwanted advertising. But sometimes you may receive an email from a new sender that ends up in the junk folder instead of your in-box. Although all email applications are slightly different, most of them have similar procedures to let you stop an email from going into the junk folder.
Add new senders' email addresses to your email address book. Messages from senders who are in your address book won't go into the junk folder.
If a message is already in the junk folder, click on it and select the option to label the message as "Not Junk" or something similar.
When prompted, select the option to add the sender's email address to your address book or to a "Safe" list, which will keep future emails from going into your junk folder.