Re: Postfix “RCPT from unknown Sender address rejected: Domain not found" error after SpamAssassin installation

[Reindl Harald]

Am 02.09.2015 um 12:08 schrieb Carlo Manuali:

I use “reject_unknown_sender_domain” as one of smtpd_recipient_restrictions. 
What I do not understand is why only when use -o content_filter=spamassassin 
this turn in the mentioned error; the transaction log (in the following line 
@domain.eu is the SMTP server domain) is very simple:

postfix/smtpd[19810]: NOQUEUE: reject: RCPT from unknown[XXX.XXX.XXX.XXX]: 450 4.1.8 
<marco.ro...@unipg.it>: Sender address rejected: Domain not found; 
from=<marco.ro...@unipg.it> to=<ori...@domain.eu> proto=ESMTP helo=<smtp.unipg.it>

column 5 in master.cf ist chroot

you enabled that by "-" instead "n" and so no surprise that postfix is not able to resolve - just don't do that! running postfix with chroot enabled is the root cause of most problems over many years - including the wrong debian defaults while not take care of a sane and working chroot

On 02 Sep 2015, at 11:57, Reindl Harald <h.rei...@thelounge.net> wrote:

"NOQUEUE: reject: RCPT from unknown Sender address rejected: Domain not found" is clearly 
Postfix and "reject_unknown_sender_domain" while you should post *all* loglines for that 
transaction and not just one stripped line

Am 02.09.2015 um 11:50 schrieb Carlo Manuali:

Hi,

I tried different senders and I always receive the same error. More of this, if 
I change back:

#smtp           inet  n       -       n       -       -       smtpd
smtp            inet  n       -       -       -       -       smtpd -o 
content_filter=spamassassin

to

smtp            inet  n       -       n       -       -       smtpd
#smtp           inet  n       -       -       -       -       smtpd -o 
content_filter=spamassassin

all comes back to working well.

So, I suppose a SpamAssassin related problem. Can I provide other useful 
information?

Thank you,
—Carlo

On 02 Sep 2015, at 11:43, Kevin A. McGrail <kmcgr...@pccc.com> wrote:

On 9/2/2015 5:34 AM, Carlo Manuali wrote:

NOQUEUE: reject: RCPT from unknown Sender address rejected: Domain not found

Are you sure the sender domain is legit and doesn't have a misspelling?

Is DNS on the box working?  I would conjecture this is much earlier in the 
discussion phase with postfix and spamassassin isn't even involved in this 
issue.

regards,
KAM

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