AT&T email settings are the server names, ports, encryption rules, and authentication details your mail client needs to send and receive messages from an AT&T-managed mailbox. Use IMAP for synced multi-device access, POP3 for single-device downloads, and SMTP for outgoing mail.
What Are the AT&T IMAP, POP3, and SMTP Settings?
Use these values when a mail client asks for manual server configuration. AT&T support publishes separate settings for IMAP and POP3, so choose one incoming protocol before you start.
| Protocol | Direction | Server | Port | Security | Authentication |
|---|---|---|---|---|---|
| IMAP | Incoming mail | imap.mail.att.net | 993 | SSL required | Full AT&T email address; OAuth or secure mail key |
| SMTP | Outgoing mail for IMAP | smtp.mail.att.net | 465 or 587 | SSL/TLS required | Full AT&T email address; OAuth or secure mail key |
| POP3 | Incoming mail | inbound.att.net | 995 | SSL required | Full AT&T email address; OAuth or secure mail key |
| SMTP | Outgoing mail for POP3 | outbound.att.net | 465 | SSL required | Full AT&T email address; OAuth or secure mail key |
These values and the listed domains come from AT&T POP3 and IMAP email settings. Check that page and AT&T secure mail key guidance again before changing a live mailbox; provider requirements can change.
Which AT&T Domains Use These Settings?
AT&T email is commonly associated with AT&T, Currently, SBCGlobal, BellSouth, and other legacy domains. These settings may apply when the mailbox uses one of these domains:
@ameritech.net@att.net@bellsouth.net@currently.com@flash.net@nvbell.net@pacbell.net@prodigy.net@sbcglobal.net@snet.net@swbell.net@wans.net
If the mailbox has been migrated, suspended, or managed through a different provider, the server values may not be enough. Confirm that the mailbox can sign in through webmail first, then configure the external client.
Should You Choose IMAP or POP3?
Choose IMAP when the same mailbox is used across multiple devices or by a team that needs consistent folders, read status, and reply context. IMAP keeps messages on the server and syncs folder state between clients.
Choose POP3 only when you intentionally want to download messages to one device. POP3 can be useful for a local archive, but it is harder to manage when replies, sent mail, and follow-up context need to stay visible across devices.
For a mailbox used by more than one person or device, confirm how the client stores sent mail and handles replies. POP3 can hide context if a client downloads messages and removes them from the server.
How Do You Set Up AT&T Email in a Mail Client?
The exact screen names differ between Gmail, Outlook, Apple Mail, Thunderbird, and mobile clients, but the sequence is usually the same.
- Open the mail client’s account settings and choose manual setup if automatic detection fails.
- Enter the full AT&T email address as the username, not only the part before
@. - Choose IMAP or POP3 for incoming mail.
- Enter the incoming server, port, and SSL setting from the table above.
- Enter the outgoing SMTP server, port, and SSL/TLS setting from the table above.
- Enable authentication for outgoing mail.
- If the app supports OAuth for AT&T Mail, complete that sign-in flow. Otherwise, create a secure mail key through your AT&T account profile and enter it in the client’s password field for both incoming and outgoing servers.
- Send a test email, receive a reply, and confirm both messages appear in the expected folders.
Do not store mailbox passwords or secure mail keys in a shared document. Treat them as credentials; remove unused keys and connections when access changes.
When Do You Need a Secure Mail Key?
AT&T says an email app without OAuth needs a secure mail key. Create one in your AT&T account profile under Settings → Add secure mail key, then copy it into the app’s password field. For IMAP, replace the password for both incoming IMAP and outgoing SMTP. AT&T says each device should have its own key and changing your AT&T account password does not change existing keys.
Use this rule:
- If the app supports OAuth for AT&T Mail, complete the offered sign-in flow.
- If the app does not use OAuth, enter a secure mail key in its password field.
- If a device is lost or no longer needs access, remove its key from your AT&T account.
If a mailbox supports a team workflow, assign an owner for connected devices and keys. A working connection does not establish permission to send commercial messages.
How Do You Troubleshoot AT&T Email Settings?
Most setup failures come from one of five issues: the wrong server, the wrong port, missing SSL, an incomplete username, or a password flow that does not match the email client.
You Can Receive Mail but Cannot Send
Check the SMTP server first. For IMAP setups, use smtp.mail.att.net with port 465 or 587. For POP3 setups, use outbound.att.net with port 465. Confirm SSL or TLS is enabled and that outgoing mail authentication uses the same full email address.
You Can Send Mail but Cannot Receive
Check the incoming protocol. IMAP should use imap.mail.att.net with port 993. POP3 should use inbound.att.net with port 995. Make sure the account has storage available and that messages are not being moved by another client rule.
Authentication Keeps Failing
Retype the full email address and check whether the client uses OAuth or a secure mail key. If the account password changed, update OAuth sign-ins as needed; AT&T says an existing secure mail key is unaffected by an account password change. A locked or blocked account may require a new key.
Connection Times Out
Test on a stable network, then try the alternate SMTP port if the client supports it. Local firewalls, VPNs, security software, and corporate networks can block mail ports. A browser sign-in test can help separate account problems from network problems.
Sent Mail or Replies Are Missing
If multiple devices use the mailbox, prefer IMAP and confirm that each client stores sent messages in the same server-side folder. POP3 downloads can make reply context hard to audit because each device may hold a different view of the mailbox.
Where Does Mailbox Setup Fit in Outreach Operations?
Mailbox configuration is not a strategy by itself. It is one control point inside a larger workflow that decides which accounts should be contacted, what information supports the message, who approves the copy, and how replies move into CRM.
For trade-led GTM work, the sequence is Signals -> Leads -> Enrichment -> Decision -> Outreach -> Pipeline. Teams can use shipment or customs records to shortlist companies, verify identity and contact context, review whether outreach is appropriate, approve a message, and route replies to a pipeline owner.
Dureach describes this operator-reviewed AI workforce in Trade Data and Hire AI Agents. This guide does not establish that AT&T Mail is a supported Dureach sender integration. Confirm the available connection methods in the product before planning a handoff.
What Should You Check Before Sending?
Before using an AT&T mailbox in a live workflow, confirm the basics:
- The mailbox signs in successfully through webmail.
- IMAP or POP3 is selected intentionally.
- Incoming and outgoing servers match the chosen protocol.
- SSL or TLS is enabled.
- Outgoing mail authentication is enabled.
- The secure mail key or OAuth connection is controlled by the account owner.
- Test messages send, receive, and appear in the expected folders.
- Suppression, consent, and opt-out handling are defined before any commercial outreach begins.
What Should You Do Next?
Choose IMAP for synchronized use or POP3 for an intentional local download. Confirm the matching SMTP server, test sending and receiving, and keep secure mail keys under the account owner’s control.
For business teams, assign ownership for email access, review checkpoints, consent, suppression, opt-outs, reply handling, and CRM handoff before using a mailbox for outreach. Check AT&T’s current terms and your applicable requirements before commercial sending.
What Are Common Questions About AT&T Mail Setup?
What are the AT&T SMTP settings?
For IMAP-based setup, use smtp.mail.att.net with port 465 or 587 and SSL/TLS enabled. For POP3-based setup, AT&T lists outbound.att.net with port 465 and SSL enabled.
What are the AT&T IMAP settings?
Use imap.mail.att.net as the incoming server, port 993, SSL enabled, and your full AT&T email address as the username.
What are the AT&T POP3 settings?
Use inbound.att.net as the incoming server, port 995, SSL enabled, and your full AT&T email address as the username.
Do I need a secure mail key for AT&T email?
AT&T says apps without OAuth need a secure mail key. Use a separate key for each device and enter it in the app’s password field.
Is IMAP better than POP3 for AT&T email?
IMAP is better for most modern workflows because it syncs mail across devices. POP3 is useful when you intentionally want one device to download and store messages locally.
Why is my AT&T email client not sending messages?
The most common causes are an incorrect SMTP server, a blocked port, disabled SSL/TLS, missing outgoing authentication, or a password field that needs a secure mail key instead of the account password.
Can I use AT&T email for cold outreach?
First check AT&T’s current terms and the rules that apply to your outreach. Set up consent, suppression, opt-out handling, and human review before sending; mail settings alone do not authorize a campaign.