simple mail transfer protocol

Simple Mail Transfer Protocol
Simple Mail Transfer Protocol
Rfc821: simple mail transfer protocol
Simple mail transfer protocol (rfc 2821)
Simple Mail Transfer Protocol (SMTP) Service ...
RFC 5321:Simple Mail Transfer Protocol
A comparative study of Simple Mail Transfer Protocol (SMTP), Post Office Protocol (POP) and X.400 Electronic Mail Protocols
Simple mail transfer protocol, Request for Comments (Standard) STD 10, 821
A No Soliciting Simple Mail Transfer Protocol (SMTP) Service Extension
Request for Comment (RFC) 2821: Simple Mail Transfer Protocol