I'd also like to be able to sort the email addresses in the address book. I'd also like to be able to change the column widths of the message window on the main screen. On a final note, there's an incompatibility between the latest version of PMMail and Codesmith's desktop enhancer, Xit . Xit gives you the ability to configure the third mouse button on a three-button mouse. If you use this ability while you are working in PMMail, your entire system can freeze solid.
All applications are reasonably equivalent in power and flexibility.
I find PMMail to be a very intuitive program to use and incredibly easy to manage, but that's something that is ultimately in the eye of the beholder. A plus for PMMail is its support for PGP and SouthSoft's plans for future enhancements of the product, including more support for PGP and some limited support for email sent as an HTML document. If you're looking for a quality email client, PMMail will easily meet your needs.