http://www.ultrasmtp.com SMTP blog Wed, 16 May 2007 17:58:55 +0000 http://backend.userland.com/rss092 en If you have just installed SMTP server I suggest immediately lock it down so no other users (remote) can use it to relay email. There are many ways to test out for a open relay - you can use online service to check it remotely or if you have a ... http://www.ultrasmtp.com/open-relay-problem/