Outlook 2013 wont connect to postfix SMTP server

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http://serverfault.com – I have a mail server set up using virtual users and postfix that i can send mail through using my Windows Phone 8 mail client but when i try and send a test email through Outlook 2013 with or without TLS enabled Outlook times out. "Outlook cannot connect to your SMTP server" but i see no connection attempt in my mail.log Also i can send when I am on the same network as my server, just not when I am on an outside network. ANy ideas? Thanks, Nat (HowTos)