Re: myhostname parameter

6 msg	DSN relay host
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10 msg	Outbound postfix routing issue
25 msg	Problem with Black List
3 msg	Looking at new mail server layout
26 msg	why every minute: 'reload configuration /etc/po...

myhostname parameter
\ Alexander Vinogradov (7 May 2008)
. \ (Wietse Venema) (7 May 2008)

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Subject:	Re: myhostname parameter
Group:	Postfix-users
From:	(Wietse Venema)
Date:	7 May 2008

Alexander Vinogradov:
> I have gateway for incoming mail with postfix and ms exchange as final
> destination and outgoing smtp server.
>
> Exchange server are running with FQDN relay.domain.tld. This name is in
> the DNS as a single mx record of our zone.
>
> Can I set "myhostname" parameter with the same FQDN so as do not get
> mail loop errors.

The Postfix SMTP CLIENT will not DELIVER mail to remote SMTP SERVERS
that announce the same MTA hostname in the SMTP handshake.

You can tweak -o options in master.cf but this removes an important
safety mechanism against mail server meltdown.

Wietse