UTF7 encode/decode problem?

[Farelf]

Another utf-7 thing.

Emailed submission, one of an otherwise "routine" batch (Win XP Pro SP3, Outlook 2003, inside work LAN with MS Windows Server 2003, Symantec AntiVirus Corporate, iinet.net.au provider)

http://www.spamcop.net/sc?id=z2066380682zc...c171c846e7b441z

Same spam, copy and paste

http://www.spamcop.net/sc?id=z2066374569zf...e18b9e5753e030z

Only one ever seen/noticed at this address (reporting level ~7-8 a day for three months), not seen at all at home address (many reports). I suspect 77.225.73.233 may be "under-reported" if others are encountering the same, particularly considering those using quick reports. Or it might just be "me" - in which case one in every 650 or so doesn't warrant any further expenditure of energy.

[Farelf]

Then there's this (in terms of possible "reasons"):

Microsoft Internet Explorer UTF-7 HTTP Response Handling Weakness

Microsoft Internet Explorer is prone to a weakness that can facilitate cross-site scripting attacks. The issue occurs because the application fails to sufficiently sanitize user-supplied input when handling UTF-7 charset data received in HTTP responses.

and Microsoft Internet Explorer UTF-7 HTTP Response Handling Weakness

Attackers can exploit this issue by enticing an unsuspecting victim to follow a malicious URI.

Well, the URI/URL string in my example looks fearsome but whether malicious or not, I would not know (not anything for an innocent such as I to play with in any event).