[otrs] broken url on messages

I know Ive botched something in the config, but I cant find where. This is the issue: Email address is otrs@domain Correct URL is http://otrs.domain/otrs URL appended to email messages: http://domain/otrs/index.pl?Action=AgentTicketZoom;TicketID=1916 Anybody have an idea WHAT I screwed up ? Ive been looking at this for weeks and Im up a tree. (plaintively: “Help?”)