Have set up a couple of e-mail accounts to try out the mail, but I am not able to receive on any. Have tried Roundcube, Squirrelmail and Webmail. But they all give the same response. I can login to them all and send mail to my hotmail account, but when I reply or try to send a new one back, I get a reply almost immediately postmaster delivery failure. Using Ispconfig2.2.35 on Ubuntu 9.10 All ports for mail are open, I think, and all green in server>services Used the http://www.howtoforge.com/perfect-server-ubuntu-9.10-karmic-koala-ispconfig-2 tutorial. Everything else is working as it should it would seem. Any ideas guys?