[105345] in North American Network Operators' Group
Re: SMTP no-such-user issues
daemon@ATHENA.MIT.EDU (Steve Bertrand)
Wed Jun 18 08:17:27 2008
Date: Wed, 18 Jun 2008 08:18:25 -0400
From: Steve Bertrand <steve@ibctech.ca>
To: nanog@nanog.org
In-Reply-To: <485733E9.5030008@ibctech.ca>
Errors-To: nanog-bounces@nanog.org
Steve Bertrand wrote:
> Hi everyone,
>
> We are experiencing an issue in regards to SMTP MTA relay responses
> regarding 'no such user', and it *apparently* appears to be only
> occurring when a particular site attempts to deliver email to us.
For the sake of completeness...
The problem has been found within the defining of a variable in chkuser:
"But I found the problem. chkuser_settings.h shows:
#define CHKUSER_NORCPT_STRING "511 sorry, no mailbox here by that name
(#5.1.1 - chkuser)\r\n"
I changed the 511 to 550 (as shown here
http://www.faqs.org/rfcs/rfc821.html )"
I'm also told that version 2.09 of chkuser works around this problem.
For those who have recommended Postfix, I'd love to switch, however
Qmail is tied so tightly into my mail infrastructure at this point that
I don't think it would be possible without months and months of
planning, and redeveloping a whole lot of internal management software.
Thanks everyone,
Steve
