Jan Schaumann writes:

>Following what I found on groups.google.com, google.com and the
>dcumentation/faq, nmh _was_ configured to use sendmail rather than smtp,

nmh 1.0.4 (and exmh 2.5) work relatively well with the NetBSD-1.5 shipped
postfix, at least no such problems as you describe, but then again,
nmh did use smtp and not invoke the sendmail command.  I was using exactly
that combination for several months without any problems (apart from the
nmh commands coredumping once too often, and exmh leaving zombies).

>and trying to re-create the problem has been to no avail.  Even trying
>to debug using "comp" and "send -snoop" does not reveal anything, as the
>problems only occur on very random instances.

Are you sure postfix' smtpd is always running, and things are properly
set up in /etc/mailer.conf?

--mkb