[Bug 45151] wine-devel: 'git send-email' via Zoho SMTP makes WineHQ mail queue go berserk

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=45151

Kyle Auble <kyle.auble at zoho.com> changed:

           What    |Removed                     |Added
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           Severity|normal                      |major

--- Comment #3 from Kyle Auble <kyle.auble at zoho.com> ---
I have enough info for one last update, but I don't think I can add anything
else beyond this point. I did go ahead and up the priority for this report.
After thinking about it a bit more, I realized this bug potentially leaves the
mailing list open to DoS attacks.

After the most recent blow-up (on May 10th), I found out that Zoho had blocked
outgoing mail service on my account. I was able to get my account unblocked,
but they weren't able to give me any debug information or transmission logs.
All they said was that my recent activity triggered an anti-abuse filter so
they lifted the block once I explained everything to them. Just to be safe,
I'll be submitting patches as attachments through Gmail from here on out
though.

According to their website, a burst of enough emails or possibly a data limit
can cause a block. The block didn't start after the SNAFU with the 7 patch
series though. The other dysfunctional patch was a larger binary one (~3.5M),
but that didn't close down my SMTP service until after it reappeared on the
patch queue Wednesday. Plus the overall message size isn't larger than, say, a
photo I'd email to family. The one other possibility they mention is that if
they get enough repeated bounces, they'll also lockdown the account.

I also finally tracked down some reports of the same problem, with multiple
copies of a message flooding an SMTP server, on various forums. It's apparently
not very common, but every discussion I found converged on a diagnosis of an
email loop, possibly between the mail queue and the spam filter within the
receiving server.

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