OFFICE 365 - SMTP over STARTTLS not working

Kevin3 months ago


Please help, I'm getting an error message

535 5.7.139 Authentication unsuccessful, the user credentials were incorrect. [AM8P191CA0007.EURP191.PROD.OUTLOOK.COM]
 - AuthenticationFailedException (... < MailManager:143 < *:96 < NotificatorMail:34 < NotificationResource:63 < ...) " while trying to send TEST MAIL with Office 365 settings - SMTP over STARTTLS not working .

Credentials are correct, I have tested it multiple times from terminal.


Attached below, how to fix this?

Anton Tananaev3 months ago

The error message seems to be pretty self explanatory:

the user credentials were incorrect