Having Exim Coexist with ListManager

The way to have Exim coexist with ListManager is to have Exim listen to another port besides port 25 (the SMTP mail default port). Let ListManager listen on port 25, then tell it to forward mail on to Exim.

Here are the steps to have Exim and ListManager coexist:

Move Exim to another port

* Locate the daemon_smtp_service option in your Exim configuration file. By default, this option is unset. You should set it to another port number besides 25. In this example we will use port 26.

Here is the Exim documentation on this feature:

Option: daemon_smtp_service
Type: string
Default: unset

This option specifies the numerical port number or the service name equivalent on which the daemon is to listen for incoming SMTP calls. It is overridden by `-oX' on the command line. If this option is not set, the service name `smtp' is used.

Once you set this option, you will need to recompile Exim for this change to take effect.

* Restart Exim.

Install and Configure ListManager

* Create an 'A' record in your DNS, which is an alternate name for the current machine. The mail that should be accepted by ListManager will be sent to this address. All mail delivered to ListManager which does not have this name will be forwarded by it on to Exim.

For example, if your machine is currently called "mail" in your DNS, add another entry below it that has the same data, but with a new name, as in:

mail IN A 207.105.6.2 ; the original host name
listmanager IN A 207.105.6.2 ; the new "alias" host name

After this change, restart your DNS server.

* Start your ListManager server in the foreground, by clicking the "Run ListManager Now" icon.

* In Utilities: Administration: Server: Server Settings: Network Settings: Receive Email, find the field that says "Forward Mail:". Type this in the Forward Mail field:

127.0.0.1 26

This instructs ListManager to forward non-ListManager mail to port 26, where Exim is listening.

Now, find the field named "Mail Receive Rules". Type the name (or names) of the host names that ListManager should accept mail for. Any mail that comes in for ListManager, which is not addressed, to these hosts will automatically be forwarded to Exim.

For example, if your machine was called "mail.mycorp.com" and you made an alias for it (in step 2) called "listmanager.mycorp.com", then in the "Mail Receive Rules" field enter this data:

@listmanager.mycorp.com

If you have multiple names for your ListManager server, which ListManager should answer, enter each of them here, separated by a carriage return. This means that all mail addressed to "@listmanager.mycorp.com" will be accepted and processed by ListManager, and any mail not addressed to "@listmanager.mycorp.com" will be forwarded to Exim.

6) Type "shutdown" on your ListManager server console. Wait for ListManager to shutdown, then start it again, by clicking the "Run ListManager Now" icon.

7) Start your mail program and send mail to lyris@ your host name. For example, if your ListManager alias is "listmanager.mycorp.com", send mail to "lyris@listmanager.mycorp.com". A minute or two after sending your message, ListManager should have sent you a response back. Now, send a test message to a user on your Exim Server to make sure that is working.

You are done!