[Workaround.org] Check existing user
Martin Simovic
martinsimovic at gmail.com
Sun May 25 11:50:45 CEST 2008
reject non existing recipients early:
.......
smtpd_recipient_restrictions =
reject_unlisted_recipient
permit_mynetworks
permit_sasl_authenticated
reject_unauth_destination
....
Martin.
On Sat, May 24, 2008 at 1:46 PM, Fabrizio Regalli <fabreg at gmail.com> wrote:
> Hi list.
> I have a strange problem when a spammer try to send e-mail to a
> non-exist user: sometime it's rejected immediately, with message: user
> does not exist but sometime is processed by postgrey as you can see in
> my log
>
> May 22 08:12:56 server postgrey: action=greylist, reason=new,
> client_name=unknown, client_address=77.110.114.151,
> sender=pierrette212_49 at bestselected.com, recipient=nospam at fabreg.it
> May 22 08:12:56 server postfix/smtpd[25072]: NOQUEUE: reject: RCPT
> from unknown[77.110.114.151]: 450 4.2.0 <nospam at fabreg.it>: Recipient
> address rejected: Check for spam messages...;
> from=<pierrette212_49 at bestselected.com> to=<nospam at fabreg.it>
> proto=ESMTP helo=<77-110-114-151.zajoulnet.com>
> May 22 08:12:57 server postfix/smtpd[25072]: disconnect from
> unknown[77.110.114.151]
> May 22 08:13:17 server postfix/smtpd[25072]: connect from
> unknown[77.110.114.151]
> May 22 08:13:21 server postgrey: action=greylist, reason=new,
> client_name=unknown, client_address=77.110.114.151,
> sender=editor at teflbus.com, recipient=nospam at fabreg.it
> May 22 08:13:21 server postfix/smtpd[25072]: NOQUEUE: reject: RCPT
> from unknown[77.110.114.151]: 450 4.2.0 <nospam at fabreg.it>: Recipient
> address rejected: Check for spam messages...;
> from=<editor at teflbus.com> to=<nospam at fabreg.it> proto=ESMTP
> helo=<77-110-114-151.zajoulnet.com>
> May 22 08:13:21 server postfix/smtpd[25072]: disconnect from
> unknown[77.110.114.151]
> May 22 08:13:38 server postfix/smtpd[25072]: connect from
> unknown[77.110.114.151]
> May 22 08:13:41 server postgrey: action=greylist, reason=new,
> client_name=unknown, client_address=77.110.114.151,
> sender=khicks at fooksy.net, recipient=nospam at fabreg.it
> May 22 08:13:41 server postfix/smtpd[25072]: NOQUEUE: reject: RCPT
> from unknown[77.110.114.151]: 450 4.2.0 <nospam at fabreg.it>: Recipient
> address rejected: Check for spam messages...; from=<khicks at fooksy.net>
> to=<nospam at fabreg.it> proto=ESMTP helo=<77-110-114-151.zajoulnet.com>
> May 22 08:13:41 server postfix/smtpd[25072]: disconnect from
> unknown[77.110.114.151]
>
> But the user "nospam" doesn't exist.
>
> Could someone please explain me why this happends?
>
> Many thanks.
> Fab
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