Virtual host help - users on virtual domains can't authenticate

[Sun Advocate Webmaster]

I have cyrus authenticating via sasldb, and all works well for local 
domains. However, "virtual" domains don't work.

My DNS for all the "virtual" domains point to my server. In cyradm, I 
created a mailbox for user at domain2.com, where domain.com is the primary 
domain. I then added a password using saslpasswd2. Using imtest, I can 
authenticate user at domain.com correctly. However, user at domain2.com fails: 
no user found.

As far as I understood, virtual support in cyrus meant adding a line to 
your imapd.conf and then specifying the domain when you create a mailbox 
in cyradm. Maybe I'm missing something???

configdirectory: /var/lib/imap
partition-default: /var/spool/imap
sievedir: /var/lib/sieve
servername: domain.com
admins: cyrus
allowanonymouslogin: no
virtdomains: yes
defaultdomain: domain.com
autocreatequota: 10000
reject8bit: no
quotawarn: 90
timeout: 30
poptimeout: 10
dracinterval: 0
drachost: localhost
allowplaintext: yes
sasl_pwcheck_method: auxprop
sasl_mech_list: PLAIN LOGIN CRAM-MD5
lmtp_overquota_perm_failure: no
unixhierarchysep: yes
altnamespace: yes
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