> Is it possible with IMail 7.xx to do ETRN for a customer who > does not have a static IP address. If not, are there any > other store-&-forward alternatives that would be usable with > a customer using Exchange behind a dynamic IP address?
Theoretically it should be possible if you write a simple client/server application that send the actual dynamic IP-Address to the Imail-server and replace this IP in the hosts file for this domain before the ETRN-command is send to the server. But in this case you have to find some solution for setting um your mail relay settings. Usually you have to use "relay for addresses" and add the fixed IP for your ETRN client. With a dynamic IP you have to configure a complete IP-range the client can came from. Depending on the size of this IP it can be a possible solution but it's not 100% secure and vulnerable if for example the Dialup-Provider a day changes the Dialup-IP-Pool. Another solution is to set up all mailboxes on your Imail-Server that the client has configured on his exchange server. (or set up a single mailbox with the nobody-alias) Now you can use a PopConnector software that run as scheduled task on the exchange server. It retrieves regulary all messages over POP3 from the imail-mailboxes and deliver them via SMTP to your exchange server. Note: This is a polling tecnique and messages usually have a slight delay because the popconnector software connects only all xx minutes. (But having a dialup line this is something that cannot be avoided) Note also that if you not set up all mailboxes on your imail server and instead use a nobody-mailbox this can create some problems with mailinglists and newsletters. This because the popconnector software must use the recipient information from the mail-header and has not more disponible the SMTP envelope data. If you use single mailboxes for every recipient the popconnector must not retrieve the recipient address from every mail header. The delivery is fixed from one imail mailbox to one exchange smtp address. Using single fixed mailboxes the exchange-admin cannot add new mailboxes without your help. (You have to add also this address on the imail server) If you use Declude Junkmail there is a trick to add the SMTP recipient address as an X-Header information. Now the PopConnector can use this information to deliver reliable all messages. There are some commercial popconnector sw (simply google for "pop3 connector") but there is also an "antique" command line tool called pullmail.exe that works fine for this task. Markus To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
