PGP / all email from me is signed using OpenPGP Encryption; if the signature is missing, do not trust the contents of the message.
I prefer email communications that have been signed and encrypted. To encrypt email to me, my public keys can be found here. Verify the SHA1 or MD5 checksum of the download - provided below.
MD5 / 45037d0dd85e3d38cae8c1b38cd16a44
SHA1 / 275c6678cecd322927cadd8f0762b378ce4fab95