Security

Don’t want emails from a specific sender? Blocking and unblocking addresses is easy.

Learn about secure mail keys—including why and when you need one.

Emails you send through Yahoo! or other servers have an AT&T digital signature.

Learn how to recover a hacked email account—and find out how you can prevent future security risks.

Learn what spam email is, how to reduce the amount you get, and how to report it to AT&T.

Learn how to remove email spam and report it to us.

Learn why an email server might reject your email messages and how to fix it.

Learn how to set up or check AT&T email on your mobile devices.

Learn about SpamGuard and email filters.

This information is intended for ISPs, email providers, customers, and other service providers who want information about the AT&T email service, how it works, and how to resolve related issues.

If you can’t sign in to your account, your account has been flagged for sending spam, or you’re not receiving email, it’s likely your account may have been hacked or compromised. Learn more about what you can do to recover your account and prevent future attacks.

Learn about secure mail keys and why you’ll need one to access your AT&T email from a desktop program or email app without Open Authentication (OAuth).

You can block email messages from an unwanted sender. Messages will automatically delete from your inbox, spam, and trash folders. Unblocking is just as easy.

Learn how AT&T protects your personal information and defends you against identity theft.

Learn how to update email client settings to send and receive email after upgrading your AT&T homepage.