On Fri, Mar 24, 2017 at 12:30:12AM -0700, Jay Gairson via Exim-users wrote: > 3) Send a test message via Exim via a telnet session to a Yahoo Group. It
> works without issue, which seems to imply that the email client is at fault.
>
> 4) Send a test message from a Desktop or phone email client to a Yahoo
> Group. The message is blocked and cited to be malware. Refine test by
> trying a different computer, different email address, and a different Yahoo
> Group, but same client -- message is blocked as malware. Refine test by
> trying a different computer, different OS, different email address,
> different Yahoo Group, and different email client -- message is blocked as
> malware. This seems to imply that it is exim at fault, but it is not clear
> how.
Probably Yahoo rejects messages due to the presence of some headers, or
look for their contents. Make a list of headers from rejected mail, then
run SMTP session via telnet and insert some headers manually, starting
with X-Mailer, X-User-Agent.
--
Eugene Berdnikov
