I have not been able to get the SME multidrop to work at all
I use a multidrop service at the small company where I work quite successfully using SME server.
Some ISPs add a header to each e-mail message as it enters the POP mailbox to assist in determining the addressee. One common header tag is: "X-Delivered-To". If your ISP does this, make note of the header tag used so that you can configure your server to look for it (explained in a later section).
My ISP adds the "X-RCPT TO:" tag to the header with the recipient's email address. Check the header of an email you have received through the multidrop account, or check with your ISP.
On the e-mail retrieval section in server-manager,
choose "multidrop" and then scroll down to the field that asks for the IP address or hostname of your ISP's secondary mail server. This secondary mail server will receive all e-mail for your domain and store it in a single POP mailbox. Further down the screen, you will need to specify the user account and password assigned by your ISP for this POP mailbox. Your server will periodically fetch this mail and distribute it to individual POP mailboxes on the server.....
If your ISP does add a header to multidrop e-mail, then select "Specify below" and enter the header tag provided by your ISP.
I also have to use the ISP's SMTP server to deliver mail because some spam filtering software will reject emails from a non-routable address.
My SME server is set up using our domain name ***.**, and I use the hostnames and addresses panel in server-manager to set "remote" IP addresses for www.***.** and ftp.***.** because the web hosting is done by our ISP.
I had to set up some pseudonyms for my users, because we use the address format steve.b@***.** and SME does not allow usernames with a "." so I set up user "steve" and pseudonym "steve.b".
If you have an email address that you want more than 1 person to receive use the groups list and set a pseudonym for that group.
e.g. "technical@***.**" as a pseudonym for "tech" group with members "Andy, Keith & Steve"
I have multidrop email services for 4 domains all forwarded to the one multidrop POP3 box. My ISP configfured this initially, although I guess you could do it manually if your ISP has a forwarding service available for each multidrop POP3 box through a webmail or similar interface.
This allows me to have 1 email address (steve.b@***.**) for 4 domains. You may ask why bother, well the other 3 domain names were around 25 characters long, (set-up before my time with the company) and just think of the number of potential problems with using an email address as long as steve.b@abcdefghijklmnopqrstuvwxy.com
My ISP also redirects the other domains to one webspace.
I set these other 3 domains up as virtual domains on the SME server, and once again set up remote IPs for www. and ftp. in the hostnames and addresses panel.
Now when I get an email delivered to any of the domains, it gets delivered to the right user, however, you can't have seperate handling of the domains on the one server, for example steve.b@ any of the four domains will always get delivered to me.
If however you want to use the same prefix eg. "sales" and handle it seperately for each of the 4 domains, then set up 4 SME servers, or look for another solution.
Hope this helps.
Regards,
SteveB