Re: POP3 SMTP - Exchange2K
- From: "Mark Arnold [MVP]" <mark@xxxxxxxx>
- Date: Tue, 16 Aug 2005 07:31:54 +0100
On Mon, 15 Aug 2005 14:49:59 -0700, "SMB" <m_bijelic@xxxxxxxxxxxxx>
wrote:
>I have some Mobile usres that get their e-mail by using a program called
>Goldmine. The problem is that they all use different ISP's. Setting up the
>POP3 is no problem, they just connect to my exchange server and receive
>their mail. The SMTP server is the problem, I have to set up each user to
>connect to their ISP's SMTP server. Can I change that so that they use my
>Exchange Server as their SMTP transport no matter what ISP they use?
>
>Please help and thanks in advance.
>
>SMB
>
You can indeed.
Your Exchange server is accessible over the Internet via SMTP using
the same host name as the POP3 server.
You will need to go into the properties of the SMTP VSI and authorise
those users you need to be able to relay. By default Exchange 2003 is
secure from relay so you need to relax things a little, but in a safe
manner.
You may still have problems because some ISPs might only allow SMTP
onto their own relays so they can keep control of what's going where.
One way to get around both the security and ISP issue is to set up
another SMTP VSI on Exchange and set it for tcp 26 instead of 25 which
is the norm. Most POP3 clients will be able to change the port that
they send to. On this new SMTP VSI you dissalow anonymous access and
only allow authenticated access. Because most ISPs (who do the
blocking thing) don't actually scan for SMTP traffic, they just block
tcp 25, your use of 26 (or 2525 or whatever makes it easier for you to
manage) would probably be allowed through.
.
- References:
- POP3 SMTP - Exchange2K
- From: SMB
- POP3 SMTP - Exchange2K
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