SMTP ● Simple Message Transfer Protocol

SMTP ● Simple Message Transfer Protocol

External Links

ShofarNexus™ ● ShofarNexus.com ● ShofarNexus.Com

Core

Dev

Kind

Kit

Leaf

Map

Message

Net

Overview

Packet

Primitives

Run

Secure

Session

Site

Socket

Sprint

Stack

Tool

The Tree

App

Internet

Hit

Kit

Link

Packet

Session

Socket

Net Tool

Transport

Application Layer Help

Aide	Console	DHCP	Director	DNS	Forward	HTTP	HTTPS	IMAP ● Internet Message Access Protocol	LLMNR
Manage	MDNS	NNTP	POP3	RDP	RTP	RTSP	Shofar	SIP	SMTP
SNMP	SSH	SSDP	Syslog	TFTP	Telnet	WhoIs	X	XMPP

SMTP ● Simple Message Transfer Protocol

SMTP Server Accept

SMTP Head Time	To
From

Data ● Start data	Quit
EHLO ● HELO ● Extended HELLO or HELLO	RCPT ● TO:<forward-path> [ SP <rcpt-parameters> ]
MAIL ● FROM:<reverse-path> [SP <mail-parameters> ]	Rset ● Reset
NoOp ● No Operation

211 ● System status	250 ● Requested mail action okay, completed
214 ● Help message	251 ● User not local; will forward to <forward-path>
220 ● <domain> Service ready	252 ● Cannot VRFY user, but will accept message and attempt delivery

354 ● Start mail input; end with <CRLF>.<CRLF>

421 ● <domain> Service not available, closing transmission channel	Requested action not taken: insufficient system storage
Requested mail action not taken: mailbox unavailable	Server unable to accommodate parameters
Requested action aborted: error in processing

500 ● Syntax error, command unrecognized	551 ● User not local; please try <forward-path>
Syntax error in parameters or arguments	552 ● Requested mail action aborted: exceeded storage allocation
502 ● Command not implemented	553 ● Requested action not taken: mailbox name not allowed
503 ● Bad sequence of commands	554 ● Transaction failed
Command parameter not implemented	555 ● MAIL FROM/RCPT TO parameters not recognized or not implemented
Server does not accept mail	556 ● mail will not be accepted
550 ● Requested action not taken: mailbox unavailable