Since I dont know which one of the above is directly responsible, I just listed all. Here's the problem. I updated from .3 to .4 without any problems at all. It worked fine for a week now; I was happy with it until today, when suddenly mails wouldnt be received anymore. when I try to send a mail from horde I get: "There was an error sending your message: unable to send data" When I send a mail from remote to local, I get "PERM_FAILURE: SMTP Error (state 10): 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)" how'd I go about solving the problem? I installed webmin today, but was pretty sure it wouldnt break anything, since it didnt break anything the first time... I also checked out the following threads: http://forum.plesk.com/showthread.php?s=&threadid=24186 http://forum.plesk.com/showthread.php?s=&threadid=24186 but couldnt find information that helped me solve my problem.