some messages in mail.app only show raw html code
I just migrated my wife's machine (a 2002 Windows XP) to iMac (10.8.4) . Unfortunately, some, but not all mail messages appear as raw html code.
The most typical of these have been imported from Eudora 7, and I suspect an error in translation of carriage returns to new lines.
But others are just mails received. I have yet to discover the common thread.
However, is there a way to force html interpretation, or at least to discover the flaw, and devise a fix?
By the way, the messages are rich text, because a URL buried in there appears as a link. I can verify that by copying the message to Textedit and switching into plain text, and it does switch to plain text.
So my guess is that somehow an html code error has been inserted at some stage. It is hard to sort out as the html code is a single long string, with no breaks, carriage returns, etc. I can provide an example if that would help.
BTW I am not facile with html, which does not help! :-(
iMac, OS X Mountain Lion (10.8.4), some email only show raw html code,