Hello like most of the users on this list know, i have a calenderserver version -2.4 from apple running on a linux squeeze box and trying around with it. I have set up some users on the calendar server like joe with the emailaddresses joe@domain.com and jack with jack@domain.com the calendar server itself has the name cal.domain.com if i send invitations form joe s iphone to jack@domain.com the server finds jack on itself and all is working if i send an invitation to a user that is not on the server the email gets sent out and holds the ics file. the normal emailaccounts of jack and joe are on a imap server that is not running on that calendar server. it is a linux box running courier and postfix. so if a email with an attached ics file arrives it should gets forwarded to ics@domain.com i should now know how i can setup a rule on maildrop that catches that email and sends it forward to the emailaddress ics@domain.com so that the caldavserver could poll it via pop and then process it via imip. and then the calendar server is processing the ics. is that way of mailrouting ok with the setup? if not how can you handle innvitations that you get on your regular emailaddress and which needs to get to the caldav server? how can the maildrop rule be setup to catch such mails (what are the special things to trigger on (some tags, attachements, etc...) i assume that to pull just one pop account is compatible with many users on the server? so that many mailboxes just forward their mails into that single account to get processed. second mailrouting question block if the calendar server sends out an invitation to a extern user, how is the reply adress build? i found out that in the exim logfile of calendar it showed that the server tried also to send away an email with the address johnson.jack@cal.domain.com so it seemed to me that the caldav server build the reply address out of the username which the user takes to login and the hostname of the calendar. so if the server uses that way to selfbuild its reply address i have to setup the mailrouting for *@cal.domain.com to get bundle all emails that get back to ics@domain.com so that the server can poll them via pop Thank you lisana