[Dovecot] lmtp bouncing -- Invalid parameters (in reply to MAIL FROM command)

[Jan-Frode Myklebust]

I just configured postfix' virtual_transport to point at my dovecot
director, but am seeing occational problems like this:

        Aug 31 11:50:06 smtpgw postfix/lmtp[5339]: 69E2F5410D: 
to=<em...@example.net>, relay=loadbalancers.example.net[192.168.42.17]:24, 
delay=0.15, delays=0.14/0.01/0/0, dsn=5.5.4, status=bounced (host 
loadbalancers.example.net[192.168.42.17] said: 501 5.5.4 Invalid parameters (in 
reply to MAIL FROM command))

but can't find anything interesting in the dovecot logs.. Anybody have 
ideas for how to make postfix play nice with dovecot's lmtp ?

        smtpgws% rpm -q postfix
        postfix-2.3.3-2.1.el5_2

        loadbalancers% rpm -q dovecot
        dovecot-2.0.13-2

        backendmailstorers% rpm -q dovecot
        dovecot-2.0.13-2


  -jf