I don't know if this is a problem that is caused by cyrus Imap server or by the postfix mail program.
As you can read I am running postfix as the MTA and Cyrus Imap server. The problem I have is the following..... When I send mail (internally) to an existing user, the mail is correctly delivered to the users mailbox, without any errors... This is the same for any user on my mailserver. Now here comes the problem... when I create a message wich is destined for a user (internal) and add another TO, CC or BCC , I get an error back saying that the mailboxes do not exist, but here is the funny part... the mail does get delivered to the people I sent it to. Personally I think this has something to do with the Postfix program, but I post it here too, since I think that there are more people, that use this same configuration, who've had this problem. Any help is welcome Thanks, Aukjan van Belkum