Jun 20 2022
04:28 AM
- last edited on
Feb 01 2023
12:33 PM
by
TechCommunityAP
Jun 20 2022
04:28 AM
- last edited on
Feb 01 2023
12:33 PM
by
TechCommunityAP
So I have one user who is plagued with one of the weirdest problems I've ever known in 30+ years of working with exchange - this is on Office365
She is sending emails from Outlook on Windows but then getting an NDR:
Delivery has failed to these recipients or groups:
email address here
Your message is larger than the size limit for messages. Please make it smaller and try sending it again.
Diagnostic information for administrators:
Generating server: GV1PR02MB8281.eurprd02.prod.outlook.com
email address here
Remote Server returned '554-5.3.4 Content conversion limit(s) exceeded 554 5.3.4 STOREDRV.Submit.Exception:ConversionFailedException; Failed to process message due to a permanent exception with message [BeginDiagnosticData]Content conversion: Maximum number of body parts (250) per message exceeded ConversionFailedException: Content conversion: Maximum number of body parts (250) per message exceeded[EndDiagnosticData]'
That's not the weird part, the weird part is as follows:
1) Any other user can send the exact same message with no problem whatsoever
2) If I run an office repair (full online) or uninstall and reinstall office, then the problem goes away and her emails send again - for a short time, after about 20-30 emails they all start failing again with the above error.
3) None of the failing messages show up in exchange logs at all that I can find, ones that succeed I can see, ones that fail for other valid reasons I can see, but these 5.3.4 emails are just not in the logs at all, it seems like the server rejects them even before they enter mail flow logging.
This is a largish and complex email they are trying to send, it does have a lot of inline images and some tables that I would expect to run the email up to around 30-40 parts (not sure how to check it). When this email is generating the 5.3.4 she can still send basic emails, it's only these complex ones that fail - but it's not the email that is the problem, other staff have been sending the same email in bulk (we are a PR company, it's a weekly mailer we send out to journalists) with no issues whatsoever, and as stated if we repair or reinstall office they temporarily send and then suddenly start failing again.
Jun 21 2022 05:16 AM
Does anyone have ANY ideas? I can add to the list of things that fix the issue temporarily but then it re-occurs after a number of emails: A completely different, known good computer, clean user profile - same thing happened, user was able to send the emails fine for a few hours and then every one bounces with the body parts message.