I have read through the forums to see if i can fix my problem, but so far no.
I installed ispconfig 3 using this tutorial http://www.howtoforge.com/perfect-se...ispconfig-3-p4
Everything is working fine (websites work fine) except for emailing.
I can send emails to other emails on my server but when i try to send out to yahoo or something, it never gets there. when i try to send email from yahoo it says
"Sorry, we were unable to deliver your message to the following address.
Remote host said: 550 #5.1.0 Address rejected firstname.lastname@example.org
Any and all help is appreciated