The major benefit of them limiting what servers the users can send mail through is
that it keeps them from sending mail through a server that is an open mail relay.
Advanced ISP
Steve Hagerman
Administrator
[EMAIL PROTECTED]
http://www.advancedisp.com/
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Don Brown
Sent: Monday, November 20, 2000 3:34 PM
To: [EMAIL PROTECTED]
Subject: Re: [IMail Forum] Multiple SMTP ports?
Looks like most ISPs are moving this way. The objective, I believe, is to
prevent dial-up users from sending mail direct (ala Maps DUL) and for the
ISP to have the advantage of mail logs.
We are primarily a web hosting company. Most of our customers use their
ISP's smtp and configure their client with a reply address of their domain
name. Most of that mail is merely forwarded to their existing pop at their
ISP.
It hasn't been a problem here, since we started in 1995.
At 08:43 AM 11/20/00 -0500, you wrote:
> > Is there a way to make IMail listen on multiple ports for SMTP?
> > Some ISP's block 25 (Earthlink) and I cannot get through, any
> > other ideas for a workaround?
>
>First is to suggest that your users get a real ISP that offers full Internet
>access. Any ISP that blocks port 25 (and can't unblock it on request), no
>matter how noble the intent, doesn't provide full Internet access. They
>provide restricted, censored Internet access. For many people it is fine,
>but for others (as you know) it is completely unacceptable. You shouldn't
>have to play games on your mail server because of a few rotten Earthlink
>customers. The flaw in Earthlink's theory of blocking port 25 is that many
>legitimate customers will need to send mail using another server. Those
>mail servers will open up ports other than 25, and then spammers will
>eventually find them be able to use Earthlink to hijack the mail server.
>
>Anyways, in real life, there's a good chance you can't get (or can't
>suggest) your customers to switch ISPs. In that case, you could set up a
>separate mail server that uses a different port. Or, there are SSL
>tunnelling programs that would allow you to set up, for example, port 465 to
>be an "SSL version" of port 25. Any connections to port 465 would use SSL,
>but the SSL tunnelling software would connect internally to port 25. This
>would allow users to connect to a different port on your server, but they
>would have to use SSL. Most new mail clients allow SSL connections. There
>will be some extra CPU overhead, though.
> -Scott
>
>Declude: Anti-spam and Anti-virus solutions for IMail.
>http://www.declude.com
>
>
>
>Please visit http://www.ipswitch.com/support/mailing-lists.html
>to be removed from this list.
>
>An Archive of this list is available at:
>http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
----
Don Brown - Dallas, Texas USA Internet Concepts, Inc.
[EMAIL PROTECTED] http://www.inetconcepts.net
PGP Key ID: 04C99A55 (972) 788-2364 Fax: (972) 788-5049
Providing Internet Solutions Worldwide - An eDataWeb Affiliate
----
Please visit http://www.ipswitch.com/support/mailing-lists.html
to be removed from this list.
An Archive of this list is available at:
http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
Please visit http://www.ipswitch.com/support/mailing-lists.html
to be removed from this list.
An Archive of this list is available at:
http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
