Redirect all dsn to single address?

Michael Scheidell michael.scheidell at
Tue Jul 12 17:43:25 CEST 2011

On 7/12/11 11:27 AM, Mikael Bak wrote:
> Lars Jørgensen wrote:
>>> This is not exactly what you asked for, but it solved the backscatter
>>> problems for our users:
take it out of, put this in

check_sender_access pcre:$postfix/checkbs.rc

in checkbs.rc:

/^(<>$|postmaster@|MAILER-DAEMON)/ reject_rbl_client

this only checks bounces.
be aware, that lusers at microsoft live programmed their password 
check/reset email to look like a bounce, and, ms live has been on 
for some time, due to current issues.

>> That looks interesting, however if I put this in
>> smtp      inet  n       -       n       -       -       smtpd
>>      -o content_filter=amavisfeed:[]:10024
>>      -o smtpd_recipient_restrictions=check_sender_access dbm:/etc/postfix/check_backscatterer
>> I get this:
>> postfix/smtpd[22684]: fatal: parameter "smtpd_recipient_restrictions": specify at least one working instance of: check_relay_domains, reject_unauth_destination, reject, defer or defer_if_permit
>> It seems I am missing something? I know this question probably belong to the people, but as you know of it, maybe you can be of assistance.
> Hi Lars,
> For me it seems a bit strange to have this on the But I have
> no idea how your configuration is like.
> I have it in my together with all other restriction classes.
> HTH,
> Mikael

Michael Scheidell, CTO
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d: 561-948-2259
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