I understand BBC may not have the technical background to critically assess this approach, but whoever using Eudora (I loved it in 2001 btw) for security should get their credentials removed via King's order. Security through "obsolescence" is no different from security through obscurity - therefore, it doesn't work. Somebody not bothering to look for holes in your software doesn't mean they don't exist - in the age…
I would be curious to know what kind of vulnerabilities the latest version of Eudora (7.1.0.9 I think) has. With how old it is (2006), surely there are several critical vulnerabilities, but all I could find when looking online is that an IMAP server or SMTP server can execute arbitrary code, which doesn't seem likely to cause a real problem, because I wouldn't expect Google, Yahoo, Microsoft, etc. to use this trick.…
I hope they are authenticating the server to prevent MITM attacks.