Error 500 on smpt with outlook integration

[Emmker]

I Just started to received an error 500 for my outgoing emails with outlook integration extension:

Error 500: 7.51330:C769371FD439DC08A4000000, 0.39570:00000000, 1.55954:0A000000, 1.33010:0A000000, 2.54258:00000000, 0.40002:00000000, 1.56562:00000000, 1.33010:0A000000, 2.54258:00000000, 0.40002:07000000, 1.56562:00000000, 1.64146:32000000, 1.33010:32000000, 2.542589040000, 1.33010:32000000, 2.542589040000, 255.1750:0A000C80, 255.31418:03001437, 0.22753:E3000000, 255.218179040000, 0.64418:0201F90F, 4.398429040000, 0.41586:0A000D80, 4.605479040000, 0.21966:10010000, 4.301589040000[EndDiagnosticData] [Hostname=GV2PR03MB9593.eurprd03.prod.outlook.com]

I can receive fine, but I cannot send emails.

any ideas?

espocrm version: 8.1.5
outlook extension version: latest

[Emmker]

Never mind. SOVED

For future reference, it happens when an inbox is full. Check your limits in the email server.