Using ETRN with WorldMail 3

ISSUE:

The ETRN command can be used to initiate delivery of queued mail

SOLUTION:

ETRN allows a remote server with intermittent connectivity, such as those using a dialup connection, to obtain mail queued for them by the WorldMail 3 Server. The SMTP receiver service at the target mail server must support the ETRN command. Note that the WorldMail 3 SMTP Receiver (SMTPRA) service supports this command.

The command-line program MSSTART, which is included with WorldMail 3, allows a remote mail server to connect to WorldMail 3 and use the ETRN command to initiate delivery of queued mail.

WorldMail 3 also supports Authenticated ETRN, which ensures the SMTP client is authenticated (using the AUTH command with a valid mailbox name and password).

Further details on all of the above can be found within the WorldMail 3 Help file, by simply searching for "ETRN" If you wish to set-up mail for a certain domain to take a particular route, and the customer to later connect using the ETRN command with a utility such as

MSSTART, please follow the instructions below:

1. Open the WorldMail 3 console

2. Click on "Security" in the left hand window ("Server" in WorldMail 3 4.x)

3. Double click the "SMTP Security" option in the right hand window ("Security in WorldMail 3 4.x)

4. Click on the "Accept mail relay for these domains" tab

5. Add the domain(s) you want to relay to

6. Click "Ok" then "Ok" again

7. Next click on the "Routes" option

8. Select the "Force" radio button then add the domain(s) you specified in the

   security settings (in step 4)

9. After you have added the domains, you must double click each instance and

   specify the IP address of the remote server for the route to be enabled.

10. Be sure to modify the port numbers if your servers are accepting mail

    through other ports other than the default, which is port 25.

11. Specify the preference of delivery for each. O (zero by default) but you

    can have 10, 20, etc. the lowest number will always be used first.

When the customer then connects to WorldMail 3 using the ETRN command (with the MSSTART utility for example), mail will be delivered to their server.

Should you wish to use Authenticated ETRN, you need create a mailbox within WorldMail 3 to allow a user to initiate delivery. An existing account can be used if required. However, it is best to create an account in the default domain, with a name such as "collect". This will ensure that a fully qualified user name does not need to be specified during the authentication process.

KEYWORDS: WM3, ETRN