[rt-users] Postfix sendmail returning status code 75

[Thomas Sibley]

On 07/31/2013 12:55 PM, Nathan Cutler wrote:
> postfix/sendmail[26576]: fatal: wwwrun(30): No recipient addresses
> found in message header
> 
> My "sendmail wrapper" is now in place and I will be watching closely
> tomorrow. Today from what I managed to capture it looked like nothing
> (or only one byte?) was being piped from RT to "sendmailpipe". This is
> consistent with what was written to the log (No recipient addresses
> found).

My guess is that you're running RT 4 under mod_perl with the wrong
SetHandler value.  Read
http://bestpractical.com/docs/rt/latest/web_deployment.html#mod_perl-2.xx and
compare your config.