After switching on the mail server, adding an MX record on the DNS of the server and on the web site of the domain supplier the mail server is working. That is sending and receiving locally works. Receiving external mail works as well but sending mail back does not work. The mail is sent but never arrives. The SMTP log gives the following message.
Jan 19 23:19:10 domain.nl postfix/smtp: connect to gmail-smtp-in.l.google.com[18.104.22.168]:25: Operation timed out
Jan 19 23:19:10 domain.nl postfix/smtp: connect to gmail-smtp-in.l.google.com[2a00:1450:4001:c02::1a]:25: No route to host
Jan 19 23:19:10 domain.nl postfix/smtp: connect to alt1.gmail-smtp-in.l.google.com[2a00:1450:4010:c04::1b]:25: No route to host
(domain.nl is not the real used domain name)
Can anybody help.
It is the last part of the server that does not work. Wiki's, webserver, network users, calendars, contracts are all working fine.
Thanks in advance.
OS X Mountain Lion (10.8.2), Wifi using airport express and extreme 2x