Can't find what you need? Try....Google
APOP is a POP3 setting that encrypts your username and password, an authentication mechanism designed to protect your POP3 account password when checking mail.
Email FAQs Glossary
Part -1
(This page)
Part -2
The information here are related to the process of email and are not arranged in alphabetically order but are group together for user easy references.

Email Daemon
An email software program residing in a mail server that manages incoming and outgoing mails.


IP address ie: and not
IP address are numeric numbers
that represents a location on the internet, most web sites have a domain name; ie: that is linked to an IP Address that emails can be sent to.

DNS (Domain Name System) is a distributed domain based naming system database that can be query to identify administers of an IP address--which is a string of numbers, ie: and translated into a string of "letters" called Domain Name -- see an example (below) here:
IP address Domain Name

eMail CRM Freeware I recommend it. It maximize the life-time value of my customers--Quick Tour
emails Art of eMail CRM How to apply minimum efforts for maximum result
at the shortest time?
eMail Bolts & Nuts Interesting emails stuff that you should  know eMail Broadcasting
eMail Marketing Tips Great email marketing strategies and ideas to help you increase sales
Sun Tzu Free eBook Sun Tzu Art of War Leaders without thoughtful strategy invite defeat.
Useful Web Sites
Freeware, shareware tools to help you speed-up your Internet connection
Guest Book  |  Minute Wisdom
Filled with stolen moments, lost dreams, and too many 'if only'


The DNS server IP Address have nothing to do with the process of email message delivery, it merely serves to turn the IP address--a series of four 8 bit numbers, ie: into a domain name - that's all.

Mailto: - is an URL (Uniform Resource Locator) that consist of some "Text" followed by the "colon" -- a communication protocol that tells (mail clients or web-browser) program residing in a computer what to do. By using the mailto: command mailto:support @ it will be translated as a dynamic email address by all mail clients.

Soft bounced refers to; mailbox full, mail server down, network busy (ie: 500, 501 Syntax Error) etc.
SMTP codes command group

Hard bounced refers to non-existing users (ie: 550, 554, address not allowed or Requested action not taken) Mail servers or email clients that have filtering device can stimulate and return mails as hard bounced.
SMTP return codes error


MIME - Multimedia Internet Mail Encoding, are the standards for describing email messages being sent over the Internet and specified by: rfc822, rfc2045, rfc2046 and rfc2047 reference available at:

IMAP4 - Internet Message Access Protocol Version 4 are used, to hold email messages and allow users to view message heading or

IMAP4 allows a client mail program to access and manipulate email messages on a remote mail server as if they were local, without the need to download the message or to deliver the message to mail readers and IMAP4 can also relay email message to SMTP mail servers using POP3

Open relay - mail servers that allow anyone (usually forgotten to secure it by IT administrators) to use it to relay emails anywhere (usually hijacked by spammers) for relaying mails to hundred of thousands or millions of recipients.





Mike Enlow
Online Stealth
Marketing eBook



100% effective.
I recommend it.

  An easy way
stop spam getting
into your PC













TCP/IP - Transmission Control Protocol / Internet Protocol creates a connection between sender and receiver using port numbers for a particular device; for example: SMTP Port 25

SMTP - Simple Mail Transport Protocol a protocol governing email transmission and reception (sending and receiving emails between mail servers).

IP - Internet Protocol prepares a packet (datagram) for transmission across the Internet with the IP header encapsulated. The IP packet is then passed to the next layer where further network information is encapsulated onto it.

Protocol a method of sending and receiving data.

POP3 - Post Office Protocol Version 3 rfc1939 used for delivering messages to (client) mail readers (fetch mails from a remote mail server and store it locally). The email client sends a login (UserID) and a password to authenticate the session. If accepted--the mail client send commands to retrieve messages, then the server transfers the messages and deletes them from the mailbox.

APOP is a POP3 setting that encrypts your username and password, an authentication mechanism designed to protect your POP3 account password when checking mail.

MX or Mail Exchangers are database records (registered domains in the "server identity" bank) particulars of domain names of mail server running with SMTP responsible for a domain or a block of domains.

For more information on Email FAQs Glossary see Part -2 Page 2

Mail readers, Mailbox, User Agent,
ARP Address Resolution Protocol
NAT Network Address Translation
MAC Media Access Control MAC Address
MTA Message Transfer Agent
Traceroute tool - finds the route packets
Finger program for retrieving Internet user info
Dig tool requests all DNS records for a host/domain
SMTP Relay Verify (checking) tool
Ping Packets Internet Groper
Whois a tool to contact network
nslookup a DNS whois tool that perform forward/reverse DNS queries for a domain
Telnet - A program that allows a user to remotely login
Throughput, MaxMtu, UART, RWIN, MSS,
TTL-Time To Live
ICMP - Internet Control Message Protocol
RFC - Request For Comments
SMTP - Simple Mail Transport Protocol
SMTP return error codes lists
Winsock Error Codes
Port Numbers, Router, Server-time-out,
Mail Host, Mail server, Email gateway
FTP - File Transfer Protocol
UDP - User Datagram Protocol

Email FAQs Glossary
Part -1 (This page)  Part -2 Page 2