Similar to VCard

AppleSingle and AppleDouble formats

.eml

Media type

Internet abuse

Mailto

S/MIME

Sieve (mail filtering language)

DomainKeys

Email address

BinHex

Hierarchical Data Format

ICalendar

MHTML

Address Resolution Protocol

11 (number)

13 (number)

Email

AOL Mail

Biff (Unix)

Distributed Sender Blackhole List

GNU Mailman

Google Groups

HTML email

.mail

Maildir

Mbox

MDaemon