Is smmapd required for local recipient verification?

[Nels Lindquist]

Hi there.

I'm trying to enable recipient verification at the MTA (Sendmail 
8.12.11) level so I can reject mail (mostly viruses) addressed to 
nonexistent recipients.  I'm using Cyrus IMAP v2.0.17 on my primary 
mail store, which is on the same box as the MTA.

Currently, sendmail accepts the message even if there is no cyrus 
mailbox defined for the recipient, and then attempts delivery via 
LMTP.  Since the recipient doesn't exist, the delivery fails and 
Sendmail generates a bounce message which is queued and a copy 
generated for the postmaster.

Is there some way to configure the MTA/LMTP interaction to check for 
local recipients during the SMTP conversation instead?  My Google 
searching produced the possibility of adding 'w' to 
CYRUSV2_MAILER_FLAGS before building sendmail.cf, and when I tried it 
on my test installation (Cyrus IMAPD v2.1.16) it seemed to work just 
fine.  However, when I enabled this flag for v2.0.17, *all* local 
mail was rejected whether the cyrus account existed or not.

Am I on the right track?  Can I even do what I want to do with 
v2.0.17, or is it necessary to upgrade to v2.1 or even 2.2 for smmapd 
support?

Thanks for any assistance!

----
Nels Lindquist <*>
Information Systems Manager
Morningstar Air Express Inc.

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