ETRN support in MailScanner required
micoots at YAHOO.COM
Sun Aug 15 16:29:53 IST 2004
--- Julian Field <mailscanner at ECS.SOTON.AC.UK> wrote:
> At 06:58 15/08/2004, you wrote:
> >My primary mailserver is on Fedora Core 1.
> >My backup mailserver is on Fedora Core 2.
> >Both run sendmail and MailScanner.
> >For my backup mailserver, I use mailertable and
> >configured in that with the primary server making
> >connections to the backup every hour (I'm using the
> >sendmail etrn.pl script from the contrib directory
> >perform this step).
> Do not bypass the noetrn setting. It is there for a
> very good reason, and
> without it your systems can easily be exploited to
> bypass all your scanning.
Ok, I've re-added the noetrn back into the MailScanner
> To make mail move from a backup mailserver (high MX
> value) to your primary
> mailserver (low MX value), you don't need to do
> anything except tell your
> backup mailserver that it can relay mail for your
> domains. In sendmail this
> just requires
> your.domain.com RELAY
> in your "access" db.
Hmm.. I didn't think that was the way to do it. What I
did was add:
domain1.com esmtp: primary-mx.domain.com
domain2.com esmtp: primary-mx.domain.com
in the /etc/mail/mailertable file and then in
If I'm understanding you correctly, what you're saying
is that all I need to do is remove the above setup
within those files, and just add:
to my backup-mx?
I did give the backup MX a high MX number within DNS,
and the primary MX a low MX number.
Remember, what I want to do is store the mail in the
backup MX for the domains I host when the primary MX
is down. I thought my "esmtp" setup within the
mailertable and the "relay-domains" file mods were the
right way to do this?
> One of the primary jobs of a backup MX is to attempt
> delivery of mail to a
> better (i.e. your primary) MX. Your MTA (sendmail)
> will do this
> automatically. You don't need anything
> special/manual to do this at all.
Thanks for your comments Julian.
> Julian Field
> Professional Support Services at www.MailScanner.biz
> MailScanner thanks transtec Computers for their
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> 5947 1415 B654
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