carolyns hat geschrieben:In the example mail you posted, would your correct email address have been in the regular Cc: (rather than a Bcc) ?
No, my address appeared only with "Envelope-To".
carolyns hat geschrieben:When you get a mail via Bcc do any of the Received lines include the word "for" followed by one of your correct email addresses?
Sometimes, it is obviously provider dependend.
carolyns hat geschrieben:I might make the Received check an option because people who receive few valid Bcc's and many spam ones to their correct email addresses may wish to have all non-friend Bcc's marked as spam (or high chance of spam) and add their friendly Bcc senders to their friends list.
That would be o.k.
carolyns hat geschrieben:I considered the possibility of an option checkbox to pass From-same-as-To-or-Cc messages, ...
If From always appeared above To, this would work and I could cache the From name and add it to my checks against To and CC. However, I looked at the source of several messages and found To before From in many of them.
I checked a lot of messages in my mail box (of course not all

Regards
Dieter