On 6/27/2012 11:31 AM, James B. Byrne wrote: > > On Wed, June 27, 2012 14:28, Noel Jones wrote: >> On 6/27/2012 8:47 AM, James B. Byrne wrote: >> >>> The background is this. We are moving from a Sendmail/Cyrus-imap >>> based system of many years to a Postfix/Cyrus-imap based email >>> system. >>> During the transitions the existing Sendmail/Cyrus-imap service >>> naturally remains active. >>> >> >> You describe a virtual mailbox domain. >> >> >>> User accounts / domains are defined in hash:/etc/postfix/virtual >>> according to the specifications in man 5 virtual and assigned to the >>> variables $virtual_aliases and $virtual_alias_domains in main.cf. >> >> but you set it up as a virtual alias domain. This is likely the >> source of your problems. List the domain in >> virtual_mailbox_domains, list the recipients in virtual_mailbox_maps. >> >> Please refer to >> http://www.postfix.org/ADDRESS_CLASS_README.html >> http://www.postfix.org/VIRTUAL_README.html#virtual_mailbox > > This is where I go astray. We use IMAP for user mailbox stores but > every user also has a system account for authentication purposes. I > read the instructions in ADDRESS_CLASS_README as implying that these > circumstances most closely match this specification: > >> The virtual alias domain class. >> >> Purpose: hosted domains where each recipient address is aliased >> to a local UNIX system account or to a remote address. > > Whereas this specification: > >> The virtual mailbox domain class. >> >> Purpose: final delivery for hosted domains where each recipient >> address can have its own mailbox, and where users do not need to >> have a UNIX system account. A virtual mailbox example is given in >> the VIRTUAL_README file. > > does not seem to me to match our user authentication or mailbox > delivery mechanisms at all. Further, the representations in the > documentation deals solely with the case of direct delivery of email > to an mbox or maildir type of arrangement. To my understanding these > are not compatible with the cyrus-imap protocol.
The fact that your users have unix accounts for auth does not change the fact that you should use a virtual mailbox domain. You'll use the cyrus-supplied delivery agent rather than the postfix-supplied virtual(8). This is covered in http://www.postfix.org/MAILDROP_README.html#direct It's also possible to set this up as a local domain using cyrus as the local delivery agent, but I think it "fits" better as a virtual mailbox domain. (virtual mailbox vs. local delivery is more of a site judgement call than a right/wrong choice -- either way will work). This is covered in http://www.postfix.org/MAILDROP_README.html#indirect A virtual alias domain is not a good choice for your described environment. Please don't use that. Be assured that if I'm giving bad advice, there's a dozen folks here that would gently correct me (as I would do for them). Any answer on this list that stands for more than 30 minutes can be considered peer-reviewed with no substantial flaws. > >> Hints for configuring cyrus with postfix can be found in the >> maildrop readme: http://www.postfix.org/MAILDROP_README.html > > If there are references in http://www.postfix.org/MAILDROP_README.html > that detail how to configure postfix and cyrus-imap together then I You'll need to generalize s/maildrop/cyrus/ in the MAILDROP_README. Obviously it's not an exact recipe for cyrus, but all the ingredients are there. -- Noel Jones
