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Simple Mail Transfer Protocol: a protocol for transferring email messages over the Internet. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for simple mail transfer protocol


simple mail transfer protocol: a protocol that enables e-mails to be sent between different servers
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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simple mail transfer protocol in Science
Simple Mail Transfer Protocol  
Short for Simple Mail Transfer Protocol. A protocol used on TCP/IP networks governing the transfer of e-mail.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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simple mail transfer protocol in Technology

(SMTP) A protocol defined in STD 10, RFC 821, used to transfer electronic mail between computers, usually over Ethernet. It is a server to server protocol, so other protocols are used to access the messages. The SMTP dialog usually happens in the background under the control of the message transfer agent, e.g. sendmail but it is possible to interact with an SMTP server using telnet to connect to the normal SMTP port, 25. E.g.
telnet 25
You should normally start by identifying the local host:
You can then issue commands to verify an address or expand an alias:
VRFY VRFY postmaster
or expand a mailing list:
EXPN c-help
You can even send a message:
MAIL From: RCPT To: DATA What is the point? . QUIT
This is useful if you want to find out exactly what is happening to your message at a certain point.
See also Post Office Protocol, RFC 822, sendmail.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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Related Abbreviations for simple mail transfer protocol


Simple Mail Transfer Protocol
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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