[CentOS] Which sasl?

I'm trying to set up imap resources in kmail, and from the logs it looks as 
though I have to set up sasldb.  I've found some documentation, but it seems 
that I need to know whether I'm using sasl or sasl2.  How can I tell?  I seem 
to have several packages installed that are returned with I query yum, and 
both versions get mentions.

Anne