This thread might be of interest: http://www.howtoforge.com/forums/showthread.php?t=34633&highlight=postfix+bounce
That's a big help, thanks. However, the soft_bounce seems to be a bit of a temporary fix. There is a mention of... "what if you replaced the bounce transport in master.cf with a pipe transport that happily cats the msg into /dev/null?" Does that seem like a good idea? If so, can you explain in simple terms how to do it? Iain
Since making the change, I notice that the postfix mailqueue has slowly risen from about 200 to over 2000. Not reached the 4 day timeout yet: maybe it'll level off when that happens.
Can someone please delete the spam reply to my question. I detest spammers. Oh, and if someone could answer my question, that'd be great!