Hello I read all forums and wanted my datacenter to connect for this issue to parallels but there is no solution still for this. So i want to share this problem with you all maybe someone can help or someone knows how to solve this. None of the domains on plesk can login to webmail and getting invalid login error however the passwords and usernames are tru. also users can send and recieve mails via outlook like programs. But the point is there, outlook just tells them mails sent , however the message cannot be delivered or they cannot recieve mails. Outlook just can connect to smtp server correctly. Is there a fix for this?