Vacation problem

[dimon at intellinetinc.com]

Quoting John Alton Tamplin <jtampli at sph.emory.edu>:

> dimon at intellinetinc.com wrote:
> 
> >So what is you suggestion? How do I fix this problem? Why the mail server 
> >doesn't accept the message if the envelope from set right?
> >
> It is hard to tell from the logs since you are using 4 different email 
> addresses, but it looks like sieve tried to send mail from <> (which 
> sendmail accepted, but gave an authentication warning since cyrus isn't 
> listed as a trusted user in your sendmail.cf file) to 
> dmitry at montana-education.ab.ca.  That gets sent, apparently to the same 
> MTA, which then has a problem talking to the relay 
> mail.montana-education.ab.ca.  It then tries to send it to 
> dmitry at intellinetinc.com (presumably an alias from postmaster), and 
> again has a problem talking to mail.intellinetinc.com and panics since 
> it has nowhere to send the bounce message.  So, it looks like Cyrus is 
> fine but your MTA is misconfigured.
> 

I did some code change in lmtpd.c in function send_response (line 872):
I changed smbuf[3] = "<>"; to smbuf[3] = "<postmaster at synodon.com>";
And it worked fine. Assuming that, I think the problem is in  MTA (Sendmail in 
my case) configuration. BUT I didn't configured my sendmail to refuse empty 
Return-Path: 
I suspect Sendmail is configured to do that by default. And I'm sure there are 
thousands MTAs doing the same thing (let's say to reject spam messages using 
empty Return-Path)
I'm not sure whose problem is that, cyrus or MTA but by defaulf installation 
(and wothout some code change in lmtpd.c) it simply does'n work!

Dmitry