Thanks for this great tutorial. I've tried to set this up a few times now, and every time i do it, I cannot use my SMTP server to send mail afterwords!
Basically the smtp server does not accept connections afterwords- and i am very unsure why. I remove all the new configs in this tutorial and everything works fine again. (This is not a pop before smpt issue etc)
Obvioulsy this isn't idea! Please let me know if you have any ideas why.