[lug] Making Postfix Play Nice (I'm not spam, really!)

[Erik Lenderman]

Ben,

I don't have an answer, however I would like to know how to remove myself
from the BLUG mailing list so that I do not need to mark these emails as
"Spam".

Do you know how do unsubscribe from the BLUG mailing-list?

Thank you,

Erik



On Thu, Jul 28, 2011 at 7:37 PM, Ben Luey <bluey at iguanaworks.net> wrote:

> When sending out e-mails to our mailing list, I'm having a problem with
> some sites thinking I'm sending spam and blocking my mail server. I'm
> running postfix and the problem is that many of our subscribers have the
> same domain / mail server (say example.net). Postfix starts sending the
> users' mail. After ~10 emails in a row to example.net, example's smtp
> says "451 4.3.2 Please try again later (in reply to MAIL FROM command))"
> as a spam blocking protection. That's no problem and  Postfix respects
> that and tries again later -- for that one email.  But postfix may have
> 50 more emails to send to that domain, so it tries to send them and gets
> the same 451. After 10 attempts in one second, example.net gets tired of
> giving 451 and blocks my mail server.
>
> Is there a way to get postfix, when it gets a 451 message, to back off
> sending all emails to that domain? If postfix only tried 2 or 3 times
> after getting the 451 and then had the whole example.net queue wait 5
> minutes and try again, I think all would be happy. But instead postfix
> keeps pounding their mail server with ~50 requests in row that all get
> 451. Then in 5 minutes, it tries all 50 requests again. Then in 5
> minutes it tries 50 requests again. Then it waits 10 minutes and tries
> again, but after the delay,cycle postfix tries EVERY email to that
> domain in just a few seconds. I've backed off the number concurrent
> connections max to 5 and that didn't make a different -- I think it
> isn't the concurrent but consecutive connections.
>
> Ideas?
>
> Ben
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-- 
Erik Lenderman
e.lenderman33 at gmail.com
571.265.3715*
* <http://www.profoundmeditationprogram.com/>
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