Hi, we have problem with PostaMasterMailbox hanged up. We use 4.0.6 on Windows but same situation was on 3.3.8. Mail configuration have POP3S protocol set up. In OTRS log i found: [Wed Mar 4 15:50:07 2015][Info][Kernel::System::Ticket::TicketCreate] New Ticket [2015030420000092/Mail2] created (TicketID=751,Queue=CC,Priority=3 normal,State=new) [Wed Mar 4 15:50:07 2015][Info][Kernel::System::Ticket::TicketCreate] New Ticket [2015030420000109/Mail2] created (TicketID=752,Queue=CC,Priority=3 normal,State=new) [Wed Mar 4 15:50:10 2015][Notice][Kernel::System::EmailParser::PartsAttachments] Totally empty attachment part (1 [Wed Mar 4 16:30:01 2015][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running [Wed Mar 4 16:40:01 2015][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running [Wed Mar 4 16:50:01 2015][Notice][Kernel::System::PID::PIDCreate] Removed PID (PostMasterMailbox/MAIL/5320, because 1 hour old! And after that OTRS start to get mails from the beginning. When OTRS work as i described above after few hours CPU of server is used in 100% by many of perl.exe processes. Any ideas? -- Jakub Szczepańczyk Inżynier Serwisu Alfavox Sp. z o.o. ul. 1 Maja 17 43-300 Bielsko-Biała Tel.: +48 33 822 43 06 Fax: +48 33 822 43 06 e-mail: j.szczepanczyk@alfavox.pl www.alfavox.pl Alfavox Sp. z o.o., 43-300 Bielsko-Biała, ul. 1 Maja 17, wpisana przez Sąd Rejonowy w Bielsku-Białej do rejestru przedsiębiorców VIII Wydziału Gospodarczego Krajowego Rejestru Sądowego pod numerem KRS 0000223533, NIP: 547-201-50-75, o kapitale zakładowym 50000zł opłaconym w całości.