Yes, When I first received the notice I considered the possibility that either
the client or the server was compromised. I started by changing the client
system to ensure that was not the issue - it is not, same error happens no
matter the client or system sent from via Exim. I then thoroughly inspected the
exam server and the MTA. Ultimately, because it was not revealing anything, I
rebuilt the system (I had other reasons to do that partially due to failing
hardware). The problem has persisted.
Yahoo has no answer and is unwilling to provide more response than they do not
think there is an issue. Unless someone has a better way to contact them than
via their forums and their mail server debugging email, I do not know how to
get their attention. It does appear that my MTA is not the only one having an
issue on their forums, but nobody seems to have found a solution.
No other listserv or service provider returns this error. When sending to Yahoo
Mail - to an individual, there is also no issue. I have thoroughly inspected my
outgoing messages for malicious content as well as the headers, but it has
literally revealed nothing that should be an issue. That said the only
difference between messages sent directly via the mail server and messages from
a client appear to be the headers. I suppose I could set the server to not
modify or set any headers and see if a message goes through....
.
> On Mar 24, 2017, at 09:31, Jeremy Harris <[email protected]> wrote:
>
>> On 24/03/17 07:30, Jay Gairson via Exim-users wrote:
>> Any tips on next steps to debug this issue and remedy it?
>
> Get further details from them, unfortunately.
>
> Try asking on the "mailop" list:
> mailto:[email protected]?subject=subscribe
>
> --
> Cheers,
> Jeremy
>
>
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