Unknown error: Mail Delivery Failed Mail delivery failed Unknown error: Mail Delivery Failed Mail delivery failed via SMTP server 'None'. SMTPDataError: 554 5.2.0 STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message. 0.35250:02011282, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:693D0000, 1.36674:0E000000, 1.61250:00000000, 1.45378:6E3D0000, 1.44866:76010000, 16.55847:E01F0000, 17.43559:0000000024020000000000000000000000000000, 20.52176:140FA78C1700103100000000, 20.50032:140FA78C8717000000000000, 0.35180:140FA78C, 255.23226:00000000, 255.27962:0A000000, 255.27962:0E000000, 255.31418:18000000, 0.35250:00000000, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:6E000000, 1.36674:32000000, 1.61250:00000000, 1.45378:73000000, 1.44866:01000000, 16.55847:DA000000, 17.43559:00000000A0030000000000000100000000000000, 20.52176:140FA78C1700101053000000, 20.50032:140FA78C871700001F000737, 0.35180:58000000, 255.23226:4800D13D, 255.27962:0A000000, 255.27962:32000000, 255.17082:DC040000, 0.27745:0A006C66, 4.21921:DC040000, 255.27962:FA000000, 255.1494:1F000130, 0.38698:77090000, 0.37692:07000000, 0.44092:0F010480, 0.41232:0F010480, 0.60208:0F010480, 0.37136:2A000100, 0.34608:2A000100, 0.55056:2A000100, 0.42768:2A000100, 0.56112:2A000100, 0.52807:2A000100, 7.36354:010000000000010963652D63, 4.33016:DC040000, 7.40748:010000000000010B20B26408, 7.57132:000000000000000007000000, 1.63016:32000000, 4.39640:DC040000, 8.45434:0476D8EA4949274CA270C841F5FDFFD612000000, 5.10786:0000000031352E32302E333233392E3032333A4442365052303530314D42323833373A61306639303235342D393636362D346134642D613163652D636565383065383562373865000F010480, 7.51330:E21CD70AF339D80800000000, 0.39570:07000000, 1.55954:0A000000, 0.49266:02000000, 1.33010:0A000000, 2.54258:00000000, 0.40002:07000000, 1.56562:00000000, 1.64146:32000000, 1.33010:32000000, 2.54258:DC040000, 255.1750:B9000000, 255.31418:0A005636, 0.22753:0A002037, 255.21817:DC040000, 0.64418:0A006136, 4.39842:DC040000, 0.41586:C3000000, 4.60547:DC040000, 0.21966:0A001C82, 4.30158:DC040000 [Hostname=DB6PR0501MB2837.eurprd05.prod.outlook.com]

Iam using microsoft office 365 mail id as outgoing mail server.It works well till yesterday. I didnt changed anything in odoo and in ms 365 server or in admin center.But from yesterday outgoing mail is not working.

Test connection is works well but i cant send mail and it showing the above error. I have checked with my gmail account it working with my gmail account.

Company mail id and outgoing mail server mail id are same. I have completed all settings in MX records of office 365 a month ago. Till yesterday its worked well but now its showing this error.

Kindly Help to solve this error