Infos:
- Used Zammad version: 3.6.x
- Used Zammad installation source: helm-chart
- Small setup without running elasticsearch
- Browser + version: Chrome 87
- Microsoft 365 / Office 365 User Account with MFA
Expected behavior:
- Adding an account to Microsoft 365 channel and receiving / sending mails is working
Actual behavior:
- Adding the account to Microsoft 365 channel works
- Receiving mail works, too
- Sending mails via this channel fails with
Can’t use Channel::Driver::Smtp: #<Net::SMTPAuthenticationError: 451 4.7.0 Temporary server error. Please try again later. PRX4 [FR2P281CA0025.DEUP281.PROD.OUTLOOK.COM] >
- The Scheduler reschedules this mail delivery but still failing
Steps to reproduce the behavior:
- Setup Microsoft 365 channel via Microsoft 365 — Zammad Admin Documentation documentation
Maybe one of you have an idea how I can solve this issue? Thx.