[CentOS] setting up postfix

[m.roth at 5-cent.us]

Larry Martell wrote:
> This should be an easy one. I'm trying to get postfix going. I've
> never done this before. I followed the directions at
> http://wiki.centos.org/HowTos/postfix. I opened port 25:
>
> iptables -I INPUT -p tcp -m tcp --dport 25 -j ACCEPT
>
<samle send elided>

> But I don't receive the mail. In a file in /var/spool/postfix/defer I see:
>
> <larry.martell at gmail.com>: connect to
> alt2.gmail-smtp-in.l.google.com[2607:f8b0:400d:c00::1a]:25: Network is
> unreachable
> recipient=larry.martell at gmail.com
> offset=654
> dsn_orig_rcpt=rfc822;larry.martell at gmail.com
> status=4.4.1
> action=delayed
> reason=connect to
> alt2.gmail-smtp-in.l.google.com[2607:f8b0:400d:c00::1a]:25: Network is
> unreachable
>
> Have I missed a step or done something wrong?
>
Unreachable... maybe you should have OUTPUT open, also?

     mark