External Emails not being Received

[Innovative]

I set my ISPConfig server up about a year ago. It's been running fine, but for some reason the past 2 days it will randomly stop sending emails to external servers. Internal email works fine, I don't get any errors back when my emails aren't going through... it's just not working. I'm running Ubuntu+Postfix+Ispconfig. If you can help me I would be extremely thankful.

[edge]

Maybe your ISP has (or is about to) close port 25?
Or.. Are you talking about sending emails to Hotmail / Yahoo or Gmail? If so, have a look at the Junk/Spam folders. The mail might be in it!

[Innovative]

Nope, I have a T1.. specifically for hosting, if that is the case.. is there a way i can set it so my server forwards to our ISP's SMTP?

[till]

Please check your mail log for errors.