Just went to Eudora's website to get info for a new customer who needs help setting up for multiple email accounts from multiple domains. Found an interesting notice: Eudora is going open source:
EudoraŽ email moves to open source development and delivers final commercial version -- Eudora 7.1 for Windows and 6.2.4 for Mac OSX.
The open source version of EudoraŽ is targeted to be released during the first half of calendar year 2007 and will be free of charge. Once the open source version of Eudora is released, QUALCOMM will cease to sell Eudora commercially.
I've used Eudora myself for about 10 years and have had many, many customers download the "sponsored" (free) version. It's hard to beat "great software" and "free" .