Re: [courier-users] Question on backscatter prevention,

> Ok, the problem: I occasionally have accounts that start rejecting
> mail
> with "456 Address temporarily unavailable" errors. Sometimes this
> clears
> up on its own, sometimes I get inpatient and "courier clear" the
> problem.
> I understand that this is backscatter prevention, yada yada.

Hi, I used to have this problem with 0.52 on FreeBSD 6 as well.

I can't rule out that it was caused by my perlfilter, since I had
the extremely silly, spamflood-panic idea to block dsn senders
(or lack thereof), which I only recently changed to reason.

However, I used to have these "456 Address temporarily unavailable"
errors
also with my perlfilter disabled. I had to put
ESMTP_BLOCKBACKSCATTER=none
both in esmtpd and in courierd conf files, then it stopped - but so I
had to go without this feature, which is a bad idea too.

Since my upgrade to 0.54 I re-enabled backscatter and until now
I have no problems. Maybe it helps in your case too.
I'm using FreeBSD and Mysql-based users.

Regards,

Lorenzo


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