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Errors with Microsoft Office 365 email

Hi all, I am getting this error when trying to send from ERPNext with Office 365 SMTP.

Does anybody know what it means?

(554, b’5.2.0 STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message. 0.35250:02017D86, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:5C430000, 1.36674:0E000000, 1.61250:00000000, 1.45378:61430000, 1.44866:44010000, 16.55847:2E1D0000, 17.43559:0000000024020000000000000000000000000000, 20.52176:140F138B1000103100000000, 20.50032:140F138B8017000000000000, 0.35180:140F138B, 255.23226:0A002C8A, 255.27962:0A000000, 255.27962:0E000000, 255.31418:0201348A, 0.35250:0A000000, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:46000000, 1.36674:32000000, 1.61250:00000000, 1.45378:4B000000, 1.44866:01000000, 16.55847:B2000000, 17.43559:00000000B0030000000000000100000000000000, 20.52176:140F138B1000101053000000, 20.50032:140F138B801700000F240000, 0.35180:58000000, 255.23226:4800D13D, 255.27962:0A000000, 255.27962:32000000, 255.17082:DC040000, 0.27745:19240000, 4.21921:DC040000, 255.27962:FA000000, 255.1494:4A240000, 0.38698:00000000, 0.37692:01000000, 0.44092:20000100, 0.41232:20000100, 0.60208:20000100, 0.37136:20000100, 0.34608:20000100, 0.55056:20000100, 0.42768:20000100, 0.56112:20000100, 0.52807:20000100, 7.36354:010000000000010920000100, 4.33016:DC040000, 7.40748:010000000000010B20000100, 7.57132:0000000000000000FE40ED2E, 1.63016:32000000, 4.39640:DC040000, 8.45434:41D11875E850074B83D94AA22CD7E47131363A53, 5.10786:0000000031352E32302E323833352E3031363A535932505230314D42323432373A66613865326262372D653363632D343763352D383762642D32323464346333333261643500001000000000, 7.51330:B09BC293A7CBD70802000000, 0.39570:00000000, 1.55954:0A000000, 0.48754:82000000, 0.40818:00000000, 0.56946:9C000000, 1.33010:0A000000, 2.54258:00000000, 0.40002:00000000, 1.56562:00000000, 1.64146:32000000, 1.33010:32000000, 2.54258:DC040000, 255.1750:52260000, 255.31418:BE000000, 0.22753:0A006136, 255.21817:DC040000, 0.64418:C3000000, 4.39842:DC040000, 0.41586:081B0000, 4.60547:DC040000, 0.21966:03000336, 4.30158:DC040000 [Hostname=SY2PR01MB2427.ausprd01.prod.outlook.com]’)
Traceback (most recent call last):
File “/home/frappeuser/frappe-bench/apps/frappe/frappe/email/queue.py”, line 415, in send_one
smtpserver.sess.sendmail(email.sender, recipient.recipient, message)
File “/usr/lib/python3.6/smtplib.py”, line 888, in sendmail
raise SMTPDataError(code, resp)
smtplib.SMTPDataError: (554, b’5.2.0 STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message. 0.35250:02017D86, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:5C430000, 1.36674:0E000000, 1.61250:00000000, 1.45378:61430000, 1.44866:44010000, 16.55847:2E1D0000, 17.43559:0000000024020000000000000000000000000000, 20.52176:140F138B1000103100000000, 20.50032:140F138B8017000000000000, 0.35180:140F138B, 255.23226:0A002C8A, 255.27962:0A000000, 255.27962:0E000000, 255.31418:0201348A, 0.35250:0A000000, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:46000000, 1.36674:32000000, 1.61250:00000000, 1.45378:4B000000, 1.44866:01000000, 16.55847:B2000000, 17.43559:00000000B0030000000000000100000000000000, 20.52176:140F138B1000101053000000, 20.50032:140F138B801700000F240000, 0.35180:58000000, 255.23226:4800D13D, 255.27962:0A000000, 255.27962:32000000, 255.17082:DC040000, 0.27745:19240000, 4.21921:DC040000, 255.27962:FA000000, 255.1494:4A240000, 0.38698:00000000, 0.37692:01000000, 0.44092:20000100, 0.41232:20000100, 0.60208:20000100, 0.37136:20000100, 0.34608:20000100, 0.55056:20000100, 0.42768:20000100, 0.56112:20000100, 0.52807:20000100, 7.36354:010000000000010920000100, 4.33016:DC040000, 7.40748:010000000000010B20000100, 7.57132:0000000000000000FE40ED2E, 1.63016:32000000, 4.39640:DC040000, 8.45434:41D11875E850074B83D94AA22CD7E47131363A53, 5.10786:0000000031352E32302E323833352E3031363A535932505230314D42323432373A66613865326262372D653363632D343763352D383762642D32323464346333333261643500001000000000, 7.51330:B09BC293A7CBD70802000000, 0.39570:00000000, 1.55954:0A000000, 0.48754:82000000, 0.40818:00000000, 0.56946:9C000000, 1.33010:0A000000, 2.54258:00000000, 0.40002:00000000, 1.56562:00000000, 1.64146:32000000, 1.33010:32000000, 2.54258:DC040000, 255.1750:52260000, 255.31418:BE000000, 0.22753:0A006136, 255.21817:DC040000, 0.64418:C3000000, 4.39842:DC040000, 0.41586:081B0000, 4.60547:DC040000, 0.21966:03000336, 4.30158:DC040000 [Hostname=SY2PR01MB2427.ausprd01.prod.outlook.com]’)

This may help with clues https://stackoverflow.com/questions/221416/smtp-error-554

Welcome to the ERPNext community!

Office 365 doesn’t provide to send using different from address other than your username to log in with.

You need both email address same.