Postfix setup

[Gavin McCullagh]

Hi,

On Tue, 14 Aug 2007, Tom Misilo wrote:

> Thanks for the replies.
> 
> I am trying to use cyrus to handle the pop3/imap requests.

> Also, would I be better of using another piece of software instead of
> cyrus?

Cyrus is highly scalable (moreso than most), but some aspects of it are a
little unusual -- eg how you do server-side filtering, etc.  It is not an
unreasonable choice, although depending on the size of your project you
might find something like dovecot a little easier to set up and maintain.

> I am sending mail from the localhost using alpine. setting it to
> localhost fixed that error. but when I tail the mail.log file this is
> what I get
> 
> Aug 14 08:34:15 linus postfix/smtp[13788]: C4B5598131:
> to=<xxxxxxxx at gmail.com>, relay=none, delay=214, delays=64/0.07/150/0,
> dsn=4.4.1, status=deferred (connect to
> alt2.gmail-smtp-in.l.google.com[72.14.215.114]: Connection timed out)

So now it's accepted your emails, but it can't connect to google.com to
deliver them, apprently because something's stopping it from connecting to
72.14.215.114 on port 25.  I'd presume that's a firewall rule somewhere as
I see it fine:

gavinmc at boing:~$ telnet 72.14.215.114 25
Trying 72.14.215.114...
Connected to 72.14.215.114.
Escape character is '^]'.
220 mx.google.com ESMTP y1si2317953hua

> I still cannot "telnet mail 25" from another computer on network. But
> it works fine if I run it on the server.  Any suggestions? 

Again the error telnet gives back is all important.  "Connection refused"
suggests postfix is probably only listening on 127.0.0.1 (a postfix config
issue).  "No route to host" or "connection timed out" probably suggests a
firewall is blocking you.  "Connection closed" might be postfix replying
and immediately closing the connection (not so likely).

It seems like you may have some sort of firewall on the mail server that's
causing most of these problems.  I'd suggest you turn off the firewall for
5 minutes and see do the problems go away.  If it does, you need to
configure the firewall properly to allow connections in and out on tcp port
25.

Gavin