I believe I have followed The Perfect SpamSnake - Ubuntu Jaunty Jackalope -Howto to the letter... I am down to what I hope is my final challenge: Incoming messages are getting stuck after content scanning in the postfix queue. When forcing a flush on the queue, I get the following in the log: Oct 25 17:16:55 spamsnake postfix/qmgr: 12361BE9BB: from=<firstname.lastname@example.org>, size=2853, nrcpt=1 (queue active) Oct 25 17:16:55 spamsnake postfix/qmgr: warning: connect to transport SMTP: No such file or directory Oct 25 17:16:55 spamsnake postfix/error: 12361BE9BB: to=<email@example.com>, relay=none, delay=8858, delays=8858/0.03/0/0.02, dsn=4.3.0, status=deferred (mail transport unavailable) transportdomain.tld refers to a single transport domain that I have defined. Is anyone else experiencing this issue? Any thoughts?