[otrs] Add new header into headers list on PostMaster Filter

Hi! I want to filter incoming mails and check 'Content-Type' header. 'Content-Type' header not found in standart headers list PostMaster Filter create/edit page. I added this field into 'PostmasterX-Header' config option and in file Kernel/Config/Files/Ticket.xml into section <ConfigItem Name="PostmasterX-Header" Required="1" Valid="1"> After this changed header 'Content-Type' found now on Filter create/edit page, but filter not working. How to correctly add new header int PostMaster Filter? -- Mykola Dzham, LEFT-(UANIC|RIPE) JID: levsha@jabber.net.ua