I regret to inform you that port designated for outgoing mail is always set to 25. It cannot be overwritten due to internal security reasons.
Mail must go through port 25 otherwise it will not be delivered. Please read full thread why you might have been experiencing with outgoing mail by reading this topic http://www.astahost....s...ost&p=89398
How are you trying to send your mail, via Outlook or cPanel? Have you configured your Outlook correctly?
I am using Apple Mail on a Macintosh, but the problem is reproducible by just telnetting to the port. The problem is that many ISPs block port 25 which is supposed to be for internetwork mail. SASL (authenticated mail) is supposed to run on 587 which is not typically blocked. My current dialup provider blocks port 25, but my broadband provider does not (yet). I am concerned that my broadband provider will block the port in the future. I guess I will blow up that bridge when I come to it.