Check the headers on that mail since in all the years of having mutiple Gmail accounts
I have never seen that.

<http://en.wikipedia.org/wiki/Email_headers#Message_header>

Good luck.

Silj


--
"Arguing with anonymous strangers on the Internet is a sucker's game
because they almost always turn out to be -- or to be indistinguishable from
-- self-righteous sixteen-year-olds possessing infinite amounts of free time."
- Neil Stephenson, _Cryptonomicon_