[vchkpw] imap before smtp

[ted]

I've got a LWQ-style qmail configuration, plus vpopmail 5.3.27 and 
courier-imap-2.1.1.20030902.  I have  roaming users enabled (as well as 
qmail-ext), and  POP3  before SMTP works perfectly (using  qmail-pop3d).

IMAP also seems to work just fine, but it does not update open-smtp. My 
workaround of creating a separate POP account to POP in without 
retrieving msgs allows me to send via IMAP, but is obviously not an 
ideal solution. (I'm using Thunderbird .2).

I've installed courier-imap numerous times (with different releases up 
to 20030902), both with authdaemon enabled as well as disabled. In both 
cases, the results are the same (meaning that I can read mail but not 
relay).

Perhaps my understanding is wrong, but I was under the impression that 
since these are virtual domains I'm having trouble with (all my domains 
are virtual), the fact that I am able to read mail at all under IMAP 
would indicate that vchkpw is being called from courier-imap. Since 
qmail-pop3d invokes vchkpw and works, I'm puzzled. I'm afraid I don't 
know where to look log-wise.

thanks for any hints.

-ted