Hi,

We've setup imail/declude as a front-end server running store & forward for several 
domains.

I thought I'd pass along a few tips of what we have learned that may not be obvious 
and can be of help to anyone else setting up this kind of configuration.

First, for Imail store & forward to work, you must follow the IPswitch KB articles on 
this.  Basically, you DO NOT define the virtual domain at all in Imail on the gateway 
machine but you need a "hosts" file entry.

As Scott has mentioned often, in gateway mode it is the OUTGOING configuration and 
filters that you adjust to control the spam tests.  However, as a result of this we 
found a few things that are subtle:

In gateway mode, the incoming server will accept all mail for a domain, even if that 
domain does not have a nobody alias because the incoming server is not the final 
server and thus does not have any of the alias or user mailbox configurations.

After storing the message locally, the incoming server then attempts to forward it to 
the final server and will connect to the final server.  If the final server does not 
have a "nobody" at that point the final server will reject the message and the 
incoming server will get the failure and return DSN undeliverable to the originator.

This adds a little load to the incoming server (versus "nobody" blocking the inbound 
right away) but offloads the final server.


Similarly, it is important to have a per-domain default to handle the "nobody" 
catch-all since IMail mailbox rules such as the "nobody" alias are applied AFTER the 
mail has been forwarded, you cannot rely on it as you would for local mail handling.

In other words, if you forward from one mailbox to another - both of them local on the 
final server, declude will not see the message at all because it is local delivery.

We had been using filters based on the final recipient and using imail forwards to 
direct mail to various final mailboxes and when we switched to a gateway mode declude 
was not giving us the same results.



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