2009/7/4 Srdan Dukic <srdan.du...@gmail.com>: > For one of my projects I'm setting up a server to test the total > number of SMTP connections that our postfix server can handle. I am > trying to isolate the first part of the smtp server transaction up to > the recipient server receiving the message i.e. the end of the smtp > transaction. Afterwards I would like to discard the message (send it > to /dev/null or something), so that the message doesn't place any > extra strain (cpu cycles, disk i/o) on the system. > > How do I set up an Postfix server so that it accepts mail for any > domain, any username and then simply deletes the message (sends it to > /dev/null)?
It sounds like you've already got a working solution, but for what it's worth I've done something similar to this before. Our machines use virtual alias maps to local accounts by default, so I found the easiest solution was to accept all domains and addresses, and map them all through to a local "blackhole" account. In /etc/aliases you can then pass this off to /dev/null. Not as efficient as the transport-based method, but it worked nicely for us. As for the testing itself, Postfix has a couple of tools that you may want to use, smtp-source and smtp-sink.
