Mailinglist Archive: opensuse (4343 mails)

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Reverse DNS lookup and Sendmail
  • From: "Luke Loh" <lloh@xxxxxxxxxx>
  • Date: Wed, 6 Nov 2002 15:42:37 +1100
  • Message-id: <6C2BB65AB4C3614E8A3E15FB0862B17C07FEA2@xxxxxxxxxxxxxxxxxxxxx>
Hello List

One of our sites uses Outlook Express clients using a sendmail server to
relay mail.

When we send mail from one of the Outlook Express clients our mail
headers look like this:

from ray ([]) by (8.9.3/8.9.3) with SMTP id
LAA02095 for <thisaddress@xxxxxxxxx>; Wed, 6 Nov 2002 11:48:21 +1100

Our problem is that we cannot send mail to any servers that have reverse
DNS lookup (anti-UCE measures) enabled. Their servers try to find a PTR
record for, which, of course, would not exist.

1. Is there any way to get the sendmail server to masquerade all mail
from the local LAN so that it relays all mail from the local LAN using
its public IP address?

2. If not, what are our options?

Thank you and regards

Luke Loh

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