B.2.3.18. PostmasterX-Header What does it mean this example? Can I populate free fields with this? Thank you in advance. Daniele Description:Module to filter and manipulate incoming messages. Get a 4 digit number to ticket free text, use regex in Match e. g. From => '(.+?)@.+?', and use () as [***] in Set =>. $Self->{'PostMaster::PreFilterModule'}->{'2-Match'} = { 'Match' => { 'Subject' => 'SomeNumber:(\\d\\d\\d\\d)' }, 'Set' => { 'X-OTRS-TicketKey-1' => 'SomeNumber', 'X-OTRS-TicketValue-1' => '[***]' }, 'Module' => 'Kernel::System::PostMaster::Filter::Match' };