[CentOS] cyrus-imapd, sendmail and delivering plus address formats

[Les Mikesell]

On 6/15/2010 1:55 PM, James B. Byrne wrote:
> CentOS-4.8
> cyrus-imapd-2.2.12-10
> sendmail-8.13.1-3.3
>
> I have a mail hub which uses cyrus-imap with sendmail  It has worked
> well for us on this and prior hosts going back to 1995.  And, I do
> not have a problem with the current setup.
>
> What I would like to do however, is to deliver plus-formatted e-mail
> addresses directly to users subfolders in their mailbox tree.  Such
> addresses take the form
> userid+subfolder+sub-subfolder at domainname.tld. How this is done I
> have not discovered. What I always get is an  ".Address Unknown"
> smtp error.

Wild guess: sendmail will lowercase the local part to normalize 
usernames as it delivers to cyrus.  Are your folder names all lowercase?

-- 
   Les Mikesell
    lesmikesell at gmail.com