[Cialug] Postfix issue

[Zachary Kotlarek]

On Jul 1, 2014, at 11:31 AM, L. V. Lammert <lvl at omnitec.net> wrote:

> This box is *accepting* emails from unknown hosts, .. yet main.cf includes
> the required reject_invalid_hostname!


Is the connection authenticated or inside your allowed network? You list permit_sasl_authenticated before reject_invalid_hostname. The first matching test wins.

Be sure master.cf doesn’t override main.cf for specific daemons. It’s fairly common to provide IP-specific listeners — for example, no auth for SMTP from localhost — that don’t have the same restrictions.

Also be sure it’s actually not resolving the hostname; if you’re pointed at the wrong DNS all hostnames resolve (to an ad server).

	Zach

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