Configuring at&t email settings correctly helps ensure reliable delivery and reduces login or sync issues on phones and computers. This guide walks through the most common settings for at&t email while explaining how to verify them for different clients.
Below is a quick reference table that summarizes key connection and security details you will use when setting up at&t email on any device.
| Protocol | Server Address | Port | Security | Authentication |
|---|---|---|---|---|
| Incoming | att.mail.servername | 993 | SSL/TLS | Required |
| Outgoing | smtp.att.yourdomain | 587 | STARTTLS | Required |
| Webmail | webmail.att.yourdomain | 443 | SSL/TLS | Required |
| Support URL | support.att.com/email | HTTPS | Recommended | Account needed |
Incoming Server Configuration Details
Host Name and Security
Use att.mail.servername as the incoming host with SSL/TLS enabled on port 993. This keeps your messages encrypted while they download to your at&t email client.
Username Format
Enter your full at&t email address as the username, and include the domain to avoid authentication failures on some devices.
Outgoing Server Configuration Details
SMTP Settings and Port
Configure the outgoing server as smtp.att.yourdomain with STARTTLS on port 587 for secure submission and delivery of at&t email.
Authentication Requirements
Outgoing mail requires the same full email address and password, and it must be enabled for submission in your account settings.
Webmail Access and Troubleshooting
Using the Web Interface
Access webmail.att.att.yourdomain over HTTPS to manage at&t email in a browser, which automatically uses the correct at&t email settings.
Common Sync Issues
If you see sync errors, verify that SSL/TLS is enabled, that the date and time on your device are correct, and that no firewall is blocking ports.
Mobile Device Setup
iOS and Android Defaults
On iOS and Android, choosing the at&t email option often fills in the correct at&t email settings automatically, but double-check port and security if issues arise.
Manual Entry Tips
When manual setup is required, copy the server names and ports exactly as listed to prevent certificate warnings or rejected authentication.
Final Recommendations
- Always use SSL/TLS for both incoming and outgoing connections to protect your at&t email traffic.
- Verify server hostnames and ports match the latest values from att support resources.
- Test sending and receiving after any network or device change.
- Keep your email client and operating system updated to reduce compatibility issues.
- Review two-factor authentication settings to ensure app passwords work smoothly.
FAQ
Reader questions
Why does my at&t email keep asking for password after I change settings?
Double-check that you are using the full email address as the username and that app-specific passwords or two-factor authentication are configured correctly.
Can I use port 465 instead of 587 for outgoing mail with at&t email?
Port 587 with STARTTLS is recommended; port 465 may be blocked or require different security settings, leading to failed delivery for at&t email.
What should I do if my at&t email shows an SSL certificate error?
Ensure your device clock is accurate, update your email client, and verify that you are connecting to att officially listed hostnames to avoid man-in-the-middle risks.
Will these at&t email settings work with third-party apps like Outlook or Thunderbird?
Yes, entering the same server details and credentials in Outlook, Thunderbird, or other clients will sync at&t email once verified against the provider requirements.