[me1010]

and, of course, DMARC -- so rejection policies can be set.

PGP FTW!

Now if only STEED would be implemented... http://g10code.com/docs/steed-usable-e2ee.pdf

But, unfortunately, even mail from a properly configured mail server on properly protected domain will still end up in gmail users' spam boxes by default. Domain and server rep systems are a bear to work with.