Message has lines too long for transport error

Occasional Visitor

Hi ,


Recently we are facing an error when replying to some emails which is the following:


Subject: Mail delivery failed: returning message to sender


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:

    message has lines too long for transport

    message has lines too long for transport


We tried doing the Auto wrap text at character 65-70.


Still the issue is there


Please advice if anyone know the solution.

2 Replies


I have the same problem

I've been experiencing the same problem with messages on Microsoft Outlook 365 only.  I've changed the value of "Automatically wrap text at character:" to 65 thru 70, as suggested in other forums, but still continue to experience this email error.