[lug] Sendmail

[Greg Horne]

I would like to use a different port (other than 25) to send mail on.  Since 
Netcom is blocking 25, i'll use 2500, or some random unassigned port.  My 
question was this:  How do I set sendmail up to allow both port 25, and 2500 
to be used to send mail?

Greg

P.S.  I am considering this because Netcom was of no help on the phone.  
They just said that they only allow their @ix.netcom.com mail to go through 
their servers.  I would like to use a relay, but I don't think that is going 
to happen.  This port thing is my alternative.

>From: Chip Atkinson <catkinson at circadence.com>
>Reply-To: lug at lug.boulder.co.us
>To: lug at lug.boulder.co.us
>Subject: Re: [lug] Sendmail
>Date: Fri, 14 Sep 2001 12:13:52 -0600
>
>I'm not sure I entirely understand the problem, but it sounds like what
>Qwest does too.  Basically you have to use their machines as relays for
>outbound mail. Why is this a problem?  I run a moderately busy mailing
>list and haven't had any problem with the relay part.  Originally I
>wanted to do my own delivery to reduce their load, but since they want
>it that way, I just said to myself "screw 'em".
>
>Greg Horne wrote:
>
>>Check this out!
>>
>>So I go on a consulting job to a company to set them up with e-mail
>>through my company.  There e-mail is @company.com, so smtp.company.com
>>is what they would use for mail servers.  Port 25 for sending and port
>>110 for receiving.  I set everybody up, and checking mail was just
>>fine.  When I went to send a test mail they got the error 10,060, which
>>when I looked it up meant that their ISP (Netcom) is blocking all
>>outgoing port 25 communication unless is goes through their mail servers
>>first (smtp.ix.netcom.com).  I sent an e-mail to netcom and am waiting
>>for a response.  I also looked around the net and found that to get
>>around this people are using alternate ports for sending like 2500.  My
>>question is this:  How can I set up sendmail to use port 25 for e-mail,
>>but also use a new port 2500 for the mail @company.com?  Can these two
>>ports work in tandem or would I have to move all clients to 2500?
>>
>>Thanks,
>>Greg Horne
>>
>>P.S.  A lot Netcom does this blocking of port 25 to other smtp servers
>>to prevent their users from spamming.  When a coworker of mine talked to
>>them on the phone they said it was in the terms of use.  Bleh!
>>
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