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IMAP Account does not send messages

Yahoo business mail forced an update on me and now I cannot fully reconnect my yahoo IMAP account on Mac Mail. I can receive but not send messages using the IMAP Account. When I go to Mail/Accounts. there is not an option to go and check the STMP server settings


Posted on Apr 18, 2019 12:50 PM

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Question marked as Apple recommended

Apple has available mail troubleshooting information for High Sierra 10.13 and for Mojave 10.14, and the Connection Doctor can be useful.


To get to the sending settings... Mail > Mail > Preferences > Accounts > select the account in the left column > Server Settings > select Edit SMTP Server List > select the mail server associated with your business account, and make the username, password, host name, TCP port and SSL/TLS setting all match your mail providers' requirements.

Posted on Apr 18, 2019 1:05 PM

5 replies
Question marked as Apple recommended

Apr 18, 2019 1:05 PM in response to scagliarini

Apple has available mail troubleshooting information for High Sierra 10.13 and for Mojave 10.14, and the Connection Doctor can be useful.


To get to the sending settings... Mail > Mail > Preferences > Accounts > select the account in the left column > Server Settings > select Edit SMTP Server List > select the mail server associated with your business account, and make the username, password, host name, TCP port and SSL/TLS setting all match your mail providers' requirements.

Question marked as Helpful

Apr 18, 2019 1:48 PM in response to scagliarini

So to confirm, you have accessed the Edit SMTP Server List entry, and have verified and re-entered settings there?


Mail has two sets of credentials and host names and related settings, one for POP or IMAP and receiving and reading mail, and a second set for SMTP or ESMTP and sending mail.


POP or IMAP working and SMTP or ESMTP not working is not at all surprising. It's quite common.


In this case, your sending settings do not match the Yahoo requirements.


Check the SMTP host name, and the username and password.


By all appearances, your SMTP server settings are incorrect.


App Passwords are not related to Yahoo SMTP login credentials.

Apr 18, 2019 3:02 PM in response to scagliarini

Okay, assuming the host names you're specifying match those associated with your Yahoo account, and then confirm that the specified Yahoo mail server is up and running, then check directly with Yahoo support folks.


Other and more draconian option is removing all related passwords from Keychain and trying to re-enter the password data again, and then if that fails backing up your data elsewhere and then entirely removing and re-adding the problem account.

IMAP Account does not send messages

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