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   Freeware eMail CRM Maximize the life-time value of your clients and getting them to smile at you Art of eMail CRM Applying minimum efforts for maximum result, at the shortest time? emails eMail Bolts & Nuts Interesting emails stuff that you should  know eMail Broadcast FAQ's eMail Marketing Tips
Great email strategies to help you increase sales
 
 


ESMTP, SMTP Connect and Data Receive
Email RFC Reply Codes
Command Groups Descriptions

 

Request For Comment (RFC) - A document outlining a standard and proposed standard to an existing standard.

The protocols and standards that currently govern RFC are constantly changing and not limited to below examples.

See SMTP return codes error
and
Definition of extension to the SMTP
 and
 rfc2821 for the basic specification of SMTP

 

ESMTP / SMTP
Reply Codes Command Groups
This page >Connect   Next page >Data Receive

  
eMail Bolts & Nuts FAQ's
How to manage and clean bounced undelivered emails? Understand why emails get bounced
How to use your desktop PCs as an email server and bypass your ISP email server, a simple process using a free mail server program
How to test your message and see if it gets deleted by broad based anti-spam filters?
A one page email course. Everything you wanted to know about emailing in a "nut shell"
Quick guide to: dig finger traceroute ping whois nslookup IP block FTP SMTP relay TCP/IP Port
How to embed email tracking code into your email? Invisible counters, codes, scripts to track viewer
Send HTML or TEXT email using formatted HTML email, you can send an entire webpage
How to embed images into HTML email for faster emailing? Prevent displaying linked-site in recipient email client status bar
RFC defined ESMTP, SMTP Status Email Error Codes? These codes are used to provide informative explanations of error conditions
How email works?  Delivery of each email is done by your ISP mail server, first establishing a conversation through your recipient port 25
Some spiders visit site after site, collecting email addresses and controlling these rogue spiders spam bots or email harvesters with robot.txt
About TCP/IP and mail server port numbers? A number between 1 and 65535 which identifies to the receiving computer what function to perform

Command

Code

   Description

     

Connect

220

<domain> Service ready

 

421

<domain> Service not available, closing transmission channel

 

 

 

HELO

250

Requested mail action okay, completed

 

500

Syntax error, command unrecognized

 

501

Syntax error in parameters or arguments

 

504

Command parameter not implemented

 

521

<domain> does not accept mail [rfc1846]

 

421

<domain> Service not available, closing transmission channel

 

 

 

EHLO

250

Requested mail action okay, completed

 

550

Not implemented

 

500

Syntax error, command unrecognized

 

501

Syntax error in parameters or arguments

 

504

Command parameter not implemented

 

421

<domain> Service not available, closing transmission channel

 

 

 

MAIL

250

Requested mail action okay, completed
 

552

Requested mail action aborted: exceeded storage allocation

 

451

Requested action aborted: local error in processing

 

452

Requested action not taken: insufficient system storage

 

500

Syntax error, command unrecognized

 

501

Syntax error in parameters or arguments

 

421

<domain> Service not available, closing transmission channel

 

 

 

RCPT

250

Requested mail action okay, completed

 

251

User not local; will forward to <forward-path>

 

550

Requested action not taken: mailbox unavailable

 

551

User not local; please try <forward-path>

 

552

Requested mail action aborted: exceeded storage allocation

 

553

Requested action not taken: mailbox name not allowed

 

450

Requested mail action not taken: mailbox unavailable

 

451

Requested action aborted: local error in processing

 

452

Requested action not taken: insufficient system storage

 

500

Syntax error, command unrecognized

 

501

Syntax error in parameters or arguments

 

503

Bad sequence of commands

 

521

<domain> does not accept mail [rfc1846]
  421 <domain> Service not available, closing transmission channel

 

 

 

DATA

354

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

451

Requested action aborted: local error in processing

 

554

Transaction failed

 

500

Syntax error, command unrecognized

 

501

Syntax error in parameters or arguments

 

503

Bad sequence of commands

 

421

<domain> Service not available, closing transmission channel

Received data
 Receive, VRFY, QUIT Next page >Data Receive

ESMTP/SMTP
  Connect and Data Receive
Reply Codes Command Groups

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Free eBook Great online Stealth Marketing strategies to help you increase sales

email tips
 
 

 
eMail Bolts & Nuts FAQ's
How to manage and clean bounced undelivered emails? Understand why emails get bounced
How to use your desktop PCs as an email server and bypass your ISP email server, a simple process using a free mail server program
How to test your message and see if it gets deleted by broad based anti-spam filters?
A one page email course. Everything you wanted to know about emailing in a "nut shell"
Quick guide to: dig finger traceroute ping whois nslookup IP block FTP SMTP relay TCP/IP Port
How to embed email tracking code into your email? Invisible counters, codes, scripts to track viewer
Send HTML or TEXT email using formatted HTML email, you can send an entire webpage
How to embed images into HTML email for faster emailing? Prevent displaying linked-site in recipient email client status bar
RFC defined ESMTP, SMTP Status Email Error Codes? These codes are used to provide informative explanations of error conditions
How email works?  Delivery of each email is done by your ISP mail server, first establishing a conversation through your recipient port 25
Some spiders visit site after site, collecting email addresses and controlling these rogue spiders spam bots or email harvesters with robot.txt
About TCP/IP and mail server port numbers? It is a number between 1 and 65535 which identifies to the receiving computer what function you want to perform

Spam-tracking 103 WHOIS tool nslookup and traceroute freeware download

 

whois.internic.net or network solutions are network registries to find out contact info for current domain or IP address

.

nslookup a DNS tool that Perform forward and reverse DNS queries for the current address (this will usually give you the IP address of a hostname)

.

traceroute finds the route packets take between you and the selected address

.

Email in a "nut shell" a one page course about emailing. Everything you wanted to know about emailing.

.

How email works? Delivery of each email is done by your ISP mailserver establishing a conversation through (port 25) of your recipient mail server

.

 

 
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