From: adi (adiimt.co.id)
Date: Wed Oct 01 2003 - 22:25:04 CDT

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On Thu, Oct 02, 2003 at 08:26:45AM +0700, Dapid Candra wrote:
> Is there a way to /dev/null-ing MX records for some address? I only want
> to receive e-mail to usernamedomain.com, not to
> usernamewww.domain.com, so I want to set MX for www.domain.com to a
> null address or something with /dev/null effect.

recent postfix snapshot has check_sender_mx_access for
smtpd_*_restrictions.

for example:

smtpd_sender_restrictions =
  ...
  check_sender_mx_access = hash:/etc/postfix/mx_access

mx_access:
null.domain.com reject not accepted

dns:
www.domain.com. IN A 0 null.domain.com.

But, if I understand the problem you're trying to solve, you
could simply reject the sender using 'old' mechanism. e.g
using check_sender_access or if domain.com is suppose to be
delivered locally, then don't put www.domain.com into
$mydestinations or $virtual_alias_domains or $virtual_mailbox_domain.

Regards,

P.Y. Adi Prasaja

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