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RE: [cobalt-security] Pros & Cons of change to Sendmail and can you do this on a Qube 3 ?
- Subject: RE: [cobalt-security] Pros & Cons of change to Sendmail and can you do this on a Qube 3 ?
- From: "Bob Noordam" <mac@xxxxxxxx>
- Date: Tue, 4 May 2004 21:13:36 +0200
- List-id: Mailing list for users to address network security on Cobalt products. <cobalt-security.list.cobalt.com>
>
> May 4 10:58:51 mailer sendmail[4006]: i44EwpC04006:
> ruleset=check_mail,
> arg1=<gxdrs@xxxxxxxxxx>, relay=[12.109.64.201], reject=501 5.1.8
> <gxdrs@xxxxxxxxxx>... Domain of sender address
> gxdrs@xxxxxxxxxx does not exist
>
>
not the same thing, this is a reject for non existant domains. Dropping mail
for which reverse dns produces a different name then the mailserver used to
id' itsself will block way more servers.