Running Exim on Different Port

hci

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Jun 15, 2004
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Some ISP's block outgoing email on port 25 unless its directed to there SMTP servers to reduce SPAM. I have heard many webhosts run a 2nd copy of Exim/Sendmail/Whatever on port 2500 to get around this. Anyone done this or know how?

Matthew
 
The correct port to use if 587; if hosting companies are using other ports they'll work but they're nonstandard.

Jeff
 
The correct port to use if 587; if hosting companies are using other ports they'll work but they're nonstandard.

Is there a correct alternate port for POP3?

Thanks.

Matthew
 
No.

If any ISP is blocking port 110 their admins need to be hit hard with a clue stick. I can't believe any ISP would disallow you from getting emails from another pop server.

There's no security issue there at all.

Jeff
 
If any ISP is blocking port 110 their admins need to be hit hard with a clue stick. I can't believe any ISP would disallow you from getting emails from another pop server.

You are exactly right. I don't think any ISP blocks POP3 that I know of. But, working for an ISP for a few years I have come to a love/hate relationship with antivirus software. We frequently have users complaining "your email server don't work". It can be a virus, spyware, firewall or most likely there virus scanner has screwed up. Then there are those users that install 3 different virus scanners on the same PC and each is fightig for full control.

My thinking is that the virus scanners are intercepting all port 25 and 110 calls. By changing Outlook Exp or whatever to a different port might be a good test to see if that is the issue. This might not work at all but I think its worth a try. The downside is antivirus/firewall might firewall other ports out though. For most virus scanners it is not easy/possible to temporarilly disable them especially over the phone. We typically tell the user to uninstall all the virus scanners then when email works again reinstall ONLY one and update it.

Matthew
 
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