Internet Mail 2000
Internet Mail 2000 is an Internet mail architecture proposed by Daniel J. Bernstein (and in subsequent years separately proposed by several others), designed with the precept that the initial storage of mail messages be the responsibility of the sender, and not of the recipient as it is with the SMTP-based Internet mail architecture. Whereas the SMTP-based Internet mail architecture has a close analogue in the architecture of paper mail, this is not the case for Internet Mail 2000.