Review for iLeopard Mail by kengrace
Rated 4 out of 5 stars
HUTA2U: Do you have Lightning installed? That's your calendar.
On another topic, if you run TEBE this theme is likely to cause problems. The GUID is not a properly-formed email address and will trip up TEBE's validation. A work round is to edit the iLeopard install.rdf to change the to "iLeopardMail@reo-2007.deviantart.com". And for good measure add 4 to indicate it's a theme. Then install it. TEBE is quite happy after that.
To create your own collections, you must have a Mozilla Add-ons account.