On Nov 19, 2008, at 6:06 PM, Wietse Venema wrote:
To stop receiving mail from the network, comment out the network facing smtpd entry in master.cf, do "postfix reload", and look for warnings in the maillog file. You can get a lot fancier and set up an access rule that replies with "421 Service unavailable for migration". Wietse
Thanks for the info, I'll look into taking this approach. J.P.