EudoraOSX
Also, because Eudora 5.2 looks at the POP server for SASL authentication and apparently thinks our pop server has CRAM-MD5 turned on, it may cause a Password/Authentication error when the user checks for new mail.
So for each Mac Eudora 5.2 you install:
1) Open up a New Message in their Eudora
2) In the Message Area, Enter :
<x-eudora-setting:12909=cram-md5>
3) Double-Click on the x-setting line you just entered above.
4) A window (see below should display). Click Set Setting

5) This will disable Cram-md5