On 12/30/2009 11:21 AM, Serge Fonville wrote: > Hi, > > I'm trying to install a postfix server and everything seemed to work ok. > Until I tried to mail from a remote domain to a remote domain, but > from 'telnet localhost 25' > I understand (suspect) this works because 127.0.0.0/8 is in mynetworks. > > How do I ensure that my mail server can only send mails either to or > from mydomains? >
Postfix, by default, only queues mail that is destined for that system (mydestination or virtual settings), included in mynetworks, or listed in relay_domains This only changes if *you* tell Postfix not to. The config below does not follow this. There are "open relay" test websites you can verify this at. > postconf -n > > smtpd_banner = Infracom Mail Server > Don't change this unless you have a really good reason. Some functionality can be lost by those connecting to you and the current line breaks the SMTP standard. > smtpd_use_tls = yes > This is deprecated. Newer versions of Postfix should use "smtpd_tls_security_level = may"
