How to show evidence to the ISP
I am facing with a problem of mail lost.
When passing through a certain MTAs,
emails with attachments will be blocked.
If there is no attachment, the emails can
pass through successfully.
I need to show the evidence to the ISPs
that their MTAs block my emails. What should
I do next?
Any suggestions, please let me know. Or
if anyone has solution to my problem, please let
NOTE: my home mail server is RH9, SENDMAIL 8.12.8-5.90
as the MTA. Already used telnet ... 25 it and it