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Re: ISP Question

From: Charles Marcus (CMarcusMedia-Brokers.com)
Date: Sun Jan 20 2008 - 12:45:07 CST


Mike Eller, on 1/20/2008 1:34 PM, said the following:
>> If you are referring to the blocking of port 25 by your ISP, then
>> perhaps you might want to investigate a port forwarding relay service.
>> There are several available. For starters: http://www.dyndsn.com might
>> have what you need to get your server running.

> I currently us EasyDNS for DNS services. My email server's MX records
> are there. Can they (or a service like that) get me around the ISP?

No (I use them too).

If you are talking about accepting INCOMING mail, then the server doing
so MUST do it on port 25, there is simply no other way, because that is
the port ALL sending servers will be using.

As Evan wrote, you could use a service that accepts your mail for you
then forwards it to your server on a different port that your ISP is not
blocking. One caveat though - if you do it this way, you can NOT SMTP
REJECT any mail, so at a MINIMUM you would want this service to always
have a list of valid recipients to check before accepting - then, if you
did any anti-spam or other checks once you have the mail, you would have
to simply DISCARD or quarantine any unwanted messages, as opposed to
rejecting them.

Otherwise, you are limited by what your ISP will allow - if they won't
allow it unless you have a commercial account - you'll have to get a
commercial account or switch ISPs.

--

Best regards,

Charles