> - smtp-auth-relaying: useful for big lan with some external users
> - smtp-after-pop: vpopmail feature that do this is good for small traffic
> network, but when you have 100 or more concurrent connection to the pop3
> you cannot use binary file but you must use a database.

I just use vpopmail and tcpserver here.  Was that insufficient for your needs 
or does the method you describe offer something more/different?  I have quite 
a few concurrent pop3 users (maybe 50-70, not 100 [yet]) and maybe half of 
that in IMAP sessions but haven't run into any problems with tcprules.  

Mind you I'm using courier-pop3d and courier-imapd instead of qmail-pop3d.


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