Hi All, We are currently using OTRS latest version. One of our customers is using an e-mail postmaster@domain.ltdmailto:postmaster@domain.ltd, but does not receive the automatic reply with the ticket number. How can I fix this? There are no automatic rules designed by me to block this. Thanks in advance, Mikey van der Worp -- Mikey van der Worphttps://www.linkedin.com/profile/view?id=182619557 System Engineer Utelisys Communications B.V. Trinity Buildings Tower A, 7th floor Pietersbergweg 15 1105 BM Amsterdam M +31 (0) 62 942 2052 T +31 (0) 20 561 8010 F +31 (0) 20 561 8021 LinkedInhttps://www.linkedin.com/company/utelisys-communications-b.v./ - Facebookhttps://www.facebook.com/utelisyscommunications http://www.utelisys.com/www.utelisys.comhttp://www.utelisys.com – https://www.utelisys.com/ https://www.utelisys.com/