Email stopped working months ago for just 1 queue
The queue that is sending emails uses smtp.office365.com and port 587. I used the exact same settings for the new queue and it worked at first but back in February it just stopped sending emails. I've verified the password is correct and was able to log into the email.
The Exim Main Log is as follows:
2019-09-24 14:13:29 1iCqFd-000DOT-Ps <= Email@Domain.com U=www P=local S=923
2019-09-24 14:13:29 1iCqFd-000DNt-1s => Email <Email@Domain.com> R=helpdesk T=helpdesk_pipe
2019-09-24 14:13:29 1iCqFd-000DNt-1s Completed
2019-09-24 14:13:30 1iCqFd-000DOI-MO [126.96.36.199] SSL verify error: certificate name mismatch: DN="/C=US/ST=Washington/L=Redmond/O=Microsoft Corporation/CN=outlook.com" H="lyh-efz.ms-acdc.office.com"
2019-09-24 14:13:36 1iCqFd-000DOI-MO auth_login authenticator failed H=lyh-efz.ms-acdc.office.com [188.8.131.52] 535 5.7.3 Authentication unsuccessful [BN6PR2001CA0018.namprd20.prod.outlook.com]
2019-09-24 14:13:44 1iCqFd-000DOI-MO == myEmail@Domain.com R=smart_route T=transport_587 defer (-42): authentication required but authentication attempt(s) failed
2019-09-24 14:22:06 Warning: purging the environment.
Answer Chosen by the Author
I fixed the issue. It was the password. I can't explain it. I used the same password to log into outlook and it worked. Reset the password and now it's firing off emails again. Go figure.