SymptomsDomain creation failed for some reason and was rolled back. The next time the domain is re-created, the following error message is displayed:
Failed domain creation: Unable to update domain data: Failed mail post-configuration: Can't create mail domain service: mailManager->addDomain() failed: mailmng failed: Can't create domain.
In Plesk 10.x error message differs:
Failed mail post-configuration: Can't create mail domain servie: mail_Facade->createDomain() failed: mailmng failed: MEAOPO.PostOffice.AddPostOffice failed for name domain.tld [domain.tld]