Thank you for your answer, Russell!
> > Am I right that qmail-pop3d gets the hostnames of the clients
> > (which do not have any)? And that because of this, the line goes
> > up? (Can't get the host that actually causes the dialup (via
> > tcpdump), because the clients are masqueraded behind the server)
> Whenever you access a server hosted by tcpserver, tcpserver attempts
> to set several environment variables. Two of these, TCPREMOTEHOST and
> TCPLOCALHOST, are set to the reverse DNS entry for the remote and
> local IP address.
hmm. Unfortunately I'm using inetd (now). Are there any
experiences? Would entries in /etc/hosts for the local machines be
ok for inetd?
(I will switch to tcpserver when installing new systems but I
would like to stay with inetd on this system)
> The other place where qmail accesses the DNS is in qmail-remote.
According to the Qmail-"Big Picture" qmail-remote is only used
when sending mail. Am I Right? DNS lookups are ok when sending
mails.
Mike.