Select POP3 or IMAP. AT&T subcontracted their mail to Yahoo last summer, and it has not worked right since. The only solution is to use webmail, as suggested. Confirm or enter the following.
Att yahoo email settings apple mail -Tried using an SMK and it failed. I'm using correct psswd for sure. Hostname: smtp. On Advanced tab, confirm: SSL checkbox is selected. Show more. For me, Yahoo mail has been stable.
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