Today, SBC still functions as a subsidiary of AT&T, but the SBCGlobal Email service has since been re-branded under the AT&T name and email accounts have migrated to the AT&T Yahoo! Service. Nevertheless, some customers continue to use SBCGlobal email addresses and these continue to be supported.
What email does SBCGlobal use?
Sbcglobal.net (AT&T) IMAP Server imap.mail.att.net
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IMAP port 993
IMAP security SSL / TLS