bounce error : message has lines too long for transport

Anonymous

I am using outlook 2021, recently many of my emails rejected, and I am getting the below massage regardless to whom i sending to (some pass without any issue)

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This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

**information removed due to privacy policy**

message has lines too long for transport

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report shows

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X-Mailer: Microsoft Outlook 16.0

Thread-Index: **information removed due to privacy policy**

Content-Language: ar-jo

X-Exim-DSN-Information: Due to administrative limits only headers are returned

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Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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109 answers

Anonymous

2023-03-18T08:24:05+00:00

Yes this is correct - the issue is only with non-Office 365 platform emails.
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Anonymous

2023-03-22T07:42:21+00:00

The problem is, that initially it used to happen with 1 mail ID, then increased to 5 mail IDs, and now, more than 50 mail IDs are all showing bounced errors, due to the same reason.
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Anonymous

2023-03-22T08:00:49+00:00

Yes. That seem to be the fact. Any fix for it?

Thank you
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Anonymous

2023-03-22T08:33:53+00:00

Yes that is correct - the issue is with non 365 platforms email hosting,
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Anonymous

2023-03-22T08:34:33+00:00

Unfortunately not, I just sent a follow up email to my contact for this issue at Microsoft.
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