Wietse, On 2/11/21 1:49 PM, Wietse Venema wrote: > sendmail -f sender recipient... < file
We could debug and solve the issue just wonder for next time: does delivery via sendmail command not change the msg by one bit? Especially no new or changed headers. Because we found our problem to be the exact position of a \r\n If this is placed one bit more left or right the error did not occur. That's why we could not reproduce it via swaks --data @/file as this adds at least one header which then pushed the problematic \r\n to an UN-problematic position. Anyway the error was in our external content filter and is fixed now. Was an error that had been undetected in our content-filter for more than 10 years :-) Cheers tobi
