On 05/31/2011 09:17 AM, Marc Muehlfeld wrote: > Hi, > > I'm currently trying SL6 with postfix for local mail delivery (no "real" mail > server). > > But I am wondering, why the sender is always "[log in to unmask]"? In > /etc/postfix/main.cf is everything on it's default. "myhostname" is not set, > what should postfix make getting the hostname via gethostname() as written in > the comments. > > A hostname and search domain is configured for the system: > # hostname -f > vm01.test.local > > I know, I can set "myhostname", but why isn't postfix getting this by itself? > > Regards, > Marc Hello, If I were to hazard a guess, I would suspect that /etc/hosts is to blame here. If your hostname is on the 127.0.0.1 line, then I've periodically seen things get a bit wonky. I'd be curious what /etc/hosts looks like, as well as, postconf -d |grep my and seeing how those match up. Pat