From: Nate Campi (no email)
Date: Sat Dec 01 2001 - 12:06:54 EST
begin Ralf Hildebrandt quotation of Sat, Dec 01, 2001 at 10:33:19AM +0100:
> On Sat, Dec 01, 2001 at 12:09:56AM -0800, Nate Campi wrote:
> > I'm running Snapshot-20011127, with
> >
> > # postconf |grep unknown_address_reject_code
> > unknown_address_reject_code = 554
> >
> > ...but test email I sent through a qmail box is getting:
> >
> > Nov 30 23:56:28 slim qmail: [ID 748625 mail.info] 1007193388.259700
> > delivery 26: deferral:
> > 209.209.45.48_does_not_like_recipient./Remote_host_said:_450_<>:_Sender_address_rejected:_Domain_not_found/Giving_up_on_209.209.45.48./
>
> Your DNS is returning a temporary error condition. Thus Postfix plays safe
> and also return a 4xx error. See:
>
> $ host -t MX spammer.com
> Nameserver not responding
> spammer.com MX record not found, try again
I read the page at http://postfix.cloud9.net/uce.html a number of times
last night and didn't see this:
reject_unknown_sender_domain
Reject the request when the sender mail address has no DNS A or MX
record. The unknown_address_reject_code parameter specifies the response
code for rejected requests (default: 450). The response is always 450 in
case of a temporary DNS error.
Looks like it's reject_unknown_sender_domain that controls this.
In this case the nameservers which have spammer.com delegated to them
aren't answering queries. Is that why it's temporary? If they were
responding and returned NXDOMAIN would postfix have given out the 554?
-- Nate Campi http://www.campin.net GnuPG key: 0xC17AEF79 Key fingerprint = BF12 722F 8799 E614 33CC FAB7 5A90 C464 C17A EF79 Windows is the answer, but only if the question was 'what is the intellectual equivalent of being a galley slave?' - To unsubscribe, send mail to with content (not subject): unsubscribe postfix-users
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