[Dovecot] password length

After setting up a very sweet Dovecot installation (with OpenLDAP) we're finding something strange:

passwords are accepted but only the first 8 characters

and anything less than 8 characters is an invalid password

For several reasons, including allowing longer passwords to make them more difficult to crack, I'd rather be able to use longer passwords.

LDAP seems to have attributes for minimum and maximum password lengths. Ours is set currently at 256 char maximum. So my guess is that Dovecot may be doing something, or there's a configuration item I missed.

Checked all the docs and the wiki.

Anyone?

Mark Richards