[Dovecot] what best for anti-spam filter?

[Morten Stevens]

On 24.07.2012 13:44, manu at netbsd.org wrote:
> Morten Stevens <mstevens at imt-systems.com> wrote:
>
>> So it is now RFC compliant. Anyway I think delaying mail traffic is 
>> not
>> a good solution.
>
> This is why whitelists and autowhilists are used in greylist filters.

Okay, and where are your whitelists at netbsd.org?

I've sent an email to you, which is delayed until now.
Note: Our servers are listed at dnswl.org with medium score.

Jul 24 12:27:32 mx1 sendmail[31933]: q6OARUOM031928: 
to=<dovecot at dovecot.org>, delay=00:00:02, xdelay=00:00:01, mailer=esmtp, 
pri=152317, relay=dovecot.org. [193.210.130.67], dsn=2.0.0, stat=Sent 
(Ok: queued as 35AF81AE8359)
Jul 24 12:28:32 mx1 sendmail[31933]: q6OARUOM031928: 
to=<manu at netbsd.org>, delay=00:01:02, xdelay=00:01:00, mailer=esmtp, 
pri=152317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.0.0, 
stat=Deferred: Connection timed out with mail.netbsd.org.
Jul 24 12:42:57 mx1 sendmail[32292]: q6OARUOM031928: 
to=<manu at netbsd.org>, delay=00:15:27, xdelay=00:01:00, mailer=esmtp, 
pri=242317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.0.0, 
stat=Deferred: Connection timed out with mail.netbsd.org.
Jul 24 12:50:53 mx1 sendmail[32518]: q6OARUOM031928: 
to=<manu at netbsd.org>, delay=00:23:23, xdelay=00:00:02, mailer=esmtp, 
pri=332317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.7.1, 
stat=Deferred: 450 4.7.1 <manu at netbsd.org>: Recipient address rejected: 
Greylisting in action, please try later
Jul 24 12:58:41 mx1 sendmail[312]: q6OARUOM031928: 
to=<manu at netbsd.org>, delay=00:31:11, xdelay=00:00:02, mailer=esmtp, 
pri=422317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.7.1, 
stat=Deferred: 450 4.7.1 <manu at netbsd.org>: Recipient address rejected: 
Greylisting in action, please try later
Jul 24 13:42:21 mx1 sendmail[1461]: q6OARUOM031928: 
to=<manu at netbsd.org>, delay=01:14:51, xdelay=00:00:01, mailer=esmtp, 
pri=512317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.7.1, 
stat=Deferred: 450 4.7.1 <manu at netbsd.org>: Recipient address rejected: 
Greylisting in action, please try later
Jul 24 13:50:53 mx1 sendmail[1672]: q6OARUOM031928: 
to=<manu at netbsd.org>, delay=01:23:23, xdelay=00:00:02, mailer=esmtp, 
pri=602317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.7.1, 
stat=Deferred: 450 4.7.1 <manu at netbsd.org>: Recipient address rejected: 
Greylisting in action, please try later

This is exactly the reason why greylisting is bad.

Best regards,

Morten