AT&T Email Settings: POP3, IMAP, and SMTP Servers

AT&T Webmail is a Yahoo-powered email client. With the proper AT&T email settings, you don't need to use's webmail interface to check your emails or send messages. Mailspring, Outlook Express, Apple Mail, and Mozilla Thunderbird can all be used to access and send messages easily.

AT&T SMTP Settings

You will need the SMTP settings below to access your account from a desktop mail program:

Option Description
SMTP Host:
  • For POP3 -
  • For IMAP -
SMTP Port:
  • For POP3 - 465
  • For IMAP- 465 or 587
SMTP Username: Your full email address (
SMTP Password: Your secure mail key (for some mail programs, your email account password may work as well)

AT&T Email Server Settings For Receiving Emails

For receiving emails, take note of the following AT&T POP and IMAP settings:

AT&T Email POP Settings

Option Description
POP3 Host:
POP3 Port: 995
Requires SSL: Yes
POP3 Username: Your full email address (
POP3 Password: Your secure mail key (for some mail programs, your email account password may work as well)

AT&T IMAP Settings

Option Description
IMAP Host:
IMAP Port: 993
Requires SSL: Yes
IMAP Username: Your full email address (
IMAP Password: Your secure mail key (for some mail programs, your email account password may work as well)

Useful Information to Remember

To send and receive a message, desktop client applications like Microsoft Outlook or Apple Mail and mobile email apps employ POP3 or IMAP. To access your mailbox, make sure you use the correct server and port settings.

These options work for mail addresses with any of the following domains:

💡 Note: AT&T email is getting a security boost. Thus, you will need to update your email settings if you use Outlook, Windows Live Mail, or Mac Mail. You may find more information about the security upgrade here. When setting up or updating your AT&T email, create a secure mail key.

Using Separate Apps on Several Devices

You will have to check each email app on each device if you access your AT&T email using different client applications on numerous devices. For example, on a laptop, you can use Outlook Mail, while on a smartphone, you can use Gmail, and on a tablet, you can use Apple Mail. You must use either an OAuth app or your secure mail key on each device.

Aliases and Disposable Email Addresses

An email alias or disposable address linked to your AT&T account does not require a secure mail key because alias and disposable accounts utilize a password similar to the primary address.

Check email at

You can access your AT&T mailbox at, previously, from a web browser using your regular password. Moreover, ensure that your Yahoo account status is up to date if your mail address ends in

Looking for Kolab Now settings or PolarisMail settings? Our Blog's Email Settings category contains specs for all major mail service providers.

POP3 vs. IMAP: What's The Difference

POP3 and IMAP are two different ways to set up a mail address in a client application.

Even though they both allow you to connect to the mail server and access your emails using a client application, they still differ in that IMAP stores messages on the server rather than on a local device like a computer. POP3 mail, on the other hand, will attempt to establish a connection and store messages locally, whether on your computer or mobile.

As a result, most people still use IMAP as their email protocol of choice.

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