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KB Article ID: 56
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Category: Dynamic DNS
Status: General
Subject: Is port 25 blocked?
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It's becoming very rare for an ISP to allow you to relay mail unrestricted these days. It's also becoming rare that you can even relay mail to anyone on standard port 25. This is because Internet Service Providers are blocking TCP port 25, the path that all mail on the internet uses. If your provider is blocking port 25 outbound you cannot send email except thru their servers. If they are blocking port 25 the other direction, inbound, then you cannot accept mail if you run your own server.
NO PROBLEM!
All of ChangeIP.com's email products can be used on alternate ports. You can use us as an alternate port smtp relay. You can use our store and forward service to forward to your server on an alternate port. ISP has port 25 restrictions? We provide reliable services just for your special needs.
Visit the product page for email
Keywords:
port 25
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smtp relay
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blocked
Article created on Monday, December 06, 2004
Last modified by Sam on Monday, December 06, 2004
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