Dear all, here is a step-by-step description of our problem, in example. A customer sends an e-mail message to a mailbox dedicated for OTRS. If a customer´s name and a customer´s email address do not contain diacritics, OTRS works absolutely correctly and everything goes fine. Fortunately, once the customer´s name or email address contains diacritical marks, this e-mail message is the last one which is delivered to OTRS. No other message comes in OTRS since this moment. A big trouble. All delivered messages stay frozen in mailbox since now. What happens next? OTRS starts to create new and new tickets from this last handled customer´s message periodically. These new tickets contain the same subject and content. In our case, the new ticket copy is created each 60 minutes. Our OTRS SysLog shows following records: notice OTRS-PMAccount-10 New Ticket [2009062210000011/...] created (TicketID=162... error OTRS-CGI-10 No plain article (article id ...) in database! notice OTRS-PMAccount-10 Can't create PID PostMasterMailbox, because it's already running (otrs.xxx.xxx.sk/24033)! These records are created in the moment when the e-mail message comes in OTRS. After 1 hour our OTRS SysLog shows following records: notice OTRS-PMAccount-10 Removed PID (PostMasterMailbox/ otrs.xxx.xxx.sk/24033, because 1 hour old! notice OTRS-PMAccount-10 New Ticket [2009062210000029/...] created (TicketID=163... as a copy of previous TicketID=162 notice OTRS-PMAccount-10 Can't create PID PostMasterMailbox, because it's already running (otrs.xxx.xxx.sk/24287)! you can see that PID has been changed here These records are shown in SysLog every 60 minutes. If we delete the e-mail message (where the customer´s name contains diacritical marks) from the mailserver, all waiting messages are transferred to OTRS correctly. And since this moment OTRS works correctly (until a message from the customer whose name contains diacritical marks is received). Then all, described here, happens again. Could anyone from you help us with any idea, please? I truly appreciate any kind of your assistance much. Thanks. Sincerely, Tibor.