Bcc recipients revealed !!

[Martyn Fearn]

I've heard recently that it may be possible for a
recipient of a Bcc'd message to reveal the email addresses
of the other recipients.

I don't want to know how to do this, if indeed it is
possible just simply whether or not it is possible.

Many thanks

Martyn Fearn

 

[Jeff Stephenson [MSFT]]

There are some older mail servers that will copy all the Bcc recipients into
the To: field if both the To: and Cc: fields are left blank. I don't know
how many of those are still out there, but by and large I think they're
gone. Other than mail sent through such servers, the Bcc: field is not
available to any recipients.