AT&T Mail SMTP Settings
AT&T consumer email, covering att.net, sbcglobal.net, bellsouth.net and nine more.
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Outgoing mail (SMTP)
SMTP server
smtp.mail.att.net
Port. STARTTLS
587
Port. SSL/TLS
465
Security
SSL/TLS on 465 (recommended) or STARTTLS on 587.
Incoming mail (IMAP)
IMAP server
imap.mail.att.net
Port. SSL/TLS
993
Incoming mail (POP3)
POP3 server
inbound.att.net
Port. SSL/TLS
995
Sending limits & login
Daily send limit
About 500 emails per day.
Authentication
AT&T requires a Secure Mail Key in place of your account password for every third-party mail client.
App password
Create one at signin.att.com > Profile > Sign-in info > Manage secure mail keys.
Covers att.net, sbcglobal.net, bellsouth.net and other legacy AT&T domains. AT&T Mail runs on Yahoo infrastructure.
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AT&T Mail SMTP, IMAP and POP3 settings
AT&T runs one mail system behind a dozen inherited domains, including att.net, sbcglobal.net, bellsouth.net, pacbell.net and prodigy.net, all pointing at the same servers. Any app that cannot sign in through AT&T's browser flow needs a 16 character secure mail key instead of the account password, and you create a separate key for every device. The webmail front end lives at currently.com.
For incoming mail, use the IMAP server imap.mail.att.net on port 993, or POP3 at inbound.att.net on port 995. Pick the exact values from the tool above and copy them straight into your mail client.
Checked against AT&T Mail's own documentation: att.com. Ports and limits change, so check there too if something will not connect.
AT&T Mail settings at a glance
One card with every server and port on it. Right click to save it, or share the page and this is the preview people see.
What to enter as your AT&T Mail username and password
Wrong credentials, not a wrong port, are the usual reason a AT&T Mail connection fails. These are the exact values to type.
Your full AT&T email address, for example name@att.net or name@sbcglobal.net
How to set up AT&T Mail in a mail client
The exact path through AT&T Mail's own settings, in order.
- 1
Create a secure mail key
Go to https://www.att.com/acctmgmt/myprofile/overview, open Settings, confirm which email account you are updating, choose Add secure mail key, give it a nickname and select Create.
- 2
Copy the key before leaving the page
Select the copy-to-clipboard option. You need the same key in both the incoming and the outgoing server boxes.
- 3
Set up incoming mail over IMAP
Incoming server imap.mail.att.net on port 993 with SSL on. Username is your full email address.
- 4
Set up outgoing mail
smtp.mail.att.net on port 465 with SSL, or port 587. Turn on outgoing server authentication and paste the secure mail key as the password.
- 5
Repeat for every device
AT&T issues one key per device, so return to the same Settings page and add a fresh key for each phone, tablet or computer.
What AT&T Mail looks like filled in
Every mail client asks for the same handful of fields. Here they are with AT&T Mail's values already in place.
Account settings: AT&T Mail
Server
smtp.mail.att.netPort
465Encryption
SSL/TLSAuthentication
RequiredUsername
Your full AT&T email address, for example name@att.net or name@sbcglobal.netPassword
Your 16 character secure mail key, not your AT&T account passwordServer
imap.mail.att.netPort
993Encryption
SSL/TLSAn illustration of the fields, not a screenshot of any one app. Field names differ slightly between Outlook, Apple Mail and Thunderbird; the values do not.
AT&T Mail SMTP settings in Thunderbird
The outgoing server dialog with AT&T Mail's details entered. Outlook and Apple Mail ask for the same four things under slightly different names.
Which port should you use for AT&T Mail?
SSL/TLS on 465 (recommended) or STARTTLS on 587.
STARTTLS
Starts as a plain connection, then upgrades to an encrypted one. The modern standard for sending.
SSL/TLS
Encrypted from the first byte. Widely supported and a good choice when 587 is blocked.
Plain SMTP
Meant for server-to-server relay. Home networks and cloud hosts block it, so do not use it to send from a client.
Why your AT&T Mail connection is failing
The failures people actually hit with AT&T Mail, and what fixes each one.
AT&T's servers will not accept the account password from apps that lack its browser sign-in. Create a secure mail key at att.com/acctmgmt/myprofile/overview and paste it into both the incoming and outgoing server.
AT&T deletes all secure mail keys whenever it locks or blocks an account. Once the account is unlocked, create a new key for each device and each email address.
AT&T uses different hostnames for POP: inbound.att.net on port 995 and outbound.att.net on port 465. The imap.mail.att.net and smtp.mail.att.net pair is for IMAP only.
Secure mail keys are independent of the password and do not expire, so a password change neither breaks nor repairs them. Delete the old key and add a new one instead.
Those legacy domains use exactly the same servers as att.net. Point the app at imap.mail.att.net and smtp.mail.att.net rather than any historic sbcglobal or bellsouth hostname.
AT&T Mail sending limits
AT&T Mail accounts come with 1 TB of mailbox storage, but AT&T's help centre publishes no daily send or per-message recipient cap.
Max attachment
25 MB total message size, across a maximum of 50 attached files
AT&T Mail servers by region and plan
AT&T Mail does not use one set of hostnames everywhere. Match the row to your account.
| Region or plan | SMTP | IMAP | POP3 |
|---|---|---|---|
| POP accounts (all AT&T domains) | outbound.att.net | Not applicable | inbound.att.net |
AT&T Mail quirks by mail client
Outlook
AT&T's own Outlook instructions have you tick 'My outgoing server (SMTP) requires authentication' and paste the secure mail key into the password box for both servers.
Sending cold email through AT&T Mail
About 500 emails per day. AT&T requires a Secure Mail Key in place of your account password for every third-party mail client.
Those caps make single-mailbox sending fine for personal mail but a poor fit for cold outreach at volume. Emailchaser spreads sending across warmed inboxes and manages deliverability, so you can scale without burning AT&T Mail accounts.
Other internet provider (isp) email
Setting up more than one mailbox? These sit in the same category as AT&T Mail.
Common questions about AT&T Mail SMTP settings
What are AT&T Mail's SMTP settings?
AT&T Mail's outgoing (SMTP) server is smtp.mail.att.net. Use port 587 (STARTTLS) or 465 (SSL/TLS). SSL/TLS on 465 (recommended) or STARTTLS on 587. Sign in with your full email address and password (or app password).
What is AT&T Mail's IMAP or POP3 server?
AT&T Mail's incoming IMAP server is imap.mail.att.net on port 993 (SSL/TLS). If you prefer POP3, use inbound.att.net on port 995.
Which port should I use for AT&T Mail?
Use port 587 with STARTTLS wherever it's offered, it's the modern standard for authenticated sending. Port 465 with SSL/TLS is a solid alternative. Avoid port 25, which most networks block for client sending. AT&T Mail's recommended value is above.
Why won't my AT&T Mail SMTP connection work?
Check authentication first: AT&T requires a Secure Mail Key in place of your account password for every third-party mail client. Create one at signin.att.com > Profile > Sign-in info > Manage secure mail keys. Then confirm the host, port and security method match exactly, a 587/SSL or 465/STARTTLS mismatch will fail to connect.
Can I send bulk or cold email through AT&T Mail?
Not at scale. About 500 emails per day. Providers throttle bursts to fight spam, so pushing cold email through one mailbox hits limits and wrecks deliverability. High-volume outreach belongs on dedicated infrastructure that spreads sending across warmed inboxes, which is what Emailchaser does.
What is currently.com and why does my att.net mail open there?
Currently is the AT&T-branded webmail front end, run in partnership with Yahoo. Your att.net, sbcglobal.net or bellsouth.net address signs in there and gets 1 TB of storage. The address itself does not change, only the website you read it on.
Do I really need a different secure mail key for my phone and my laptop?
Yes. AT&T issues one key per device, so make a new one from the same Settings page for each device you set up. Give each a nickname so you can tell them apart later. Keys do not expire on their own.
Which addresses do these settings cover?
AT&T lists twelve domains on one settings page: ameritech.net, att.net, bellsouth.net, currently.com, flash.net, nvbell.net, pacbell.net, prodigy.net, sbcglobal.net, snet.net, swbell.net and wans.net. All of them use imap.mail.att.net and smtp.mail.att.net.
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