SMTP Status Codes and Error Messages from Error 530


SMTP status code – 530 – Authentication is required or Your server has been blacklisted by the recipient’s server or The recipient’s mailbox does not exist
(also called SMTP Error 5.3.0)
SMTP Error 530 : Originally this error has always
pointed to a problem with the SMTP server you are
using requiring authentication (a username +
password every time you send an email), as per the
examples below. However read this entry fully ….
One example would be because that SMTP server,
typically your ISP’s SMTP server, requires all email sent
through it to be done with authentication (and your email
program or server is not configured to do so).

The other classic example of this error is when you are
trying to send emails through a particular ISP’s SMTP
server but you are not doing so through that ISP’s
broadband connection. For example : at home you use
Verizon and you have configured Windows Mail (Outlook /
Outlook Express) on your laptop to send emails through
the Verizon SMTP server available free of charge to you as
a Verizon customer. All works well without authentication.
You then take a vacation to visit friends in Canada and at
their house their wireless Internet is through Telus. The
first time you try to send emails you get a
“530 Authentication is required” error. This is because the
Verizon SMTP server realises that you are trying to access
it through a DSL service not provided by Verizon (your
friends’ DSL service is provided by Telus) and it will only
allow you to access it if you can provide your Verizon
username + password (authentication) thus confirming that

as a paid Verizon customer you are allowed to use their
SMTP server even though you are connecting to it through
a Telus DSL service. If at that point you then configure
Windows Mail / Outlook / Outlook Express to use
authentication, the problem will disappear.
In another example GMAIL (Googlemail) introduces a
secondary SMTP error 570 with its 530 replies. Here is a
typical GMAIL response telling that you need to use
authentication : “530, response: 5.7.0 Must issue a
STARTTLS command first”.

In a departure from the original intended use for error 530,
one of the most irritating misuse of SMTP response 530 is
its use to either indicate that your server has been
blocked by the recipient’s server or that the recipient’s
mailbox does not exist. And to make matters worse, the
explanation text attached to the error is totally misleading.
Judge for yourself – how would you ever suspect that
“SMTP error 530 : The message cannot be delivered
due to a configuration error on the server. Please
contact your Administrator.” either means that the
recipient’s server has actually blacklisted your server
or that the recipient’s mailbox does not exist ? Mad !!!
This misuse of error 530 is a fault of the outgoing
mailserver, almost always your own ISP’s server which
should return a 554 or similar error (for example : “554 this
user doesn’t have a account”), but which
instead returns a 530 error.

Above are list of SMTP Errors Codes and Status Codes along with Error and Warning messages from Error 530 received while performing certain operation against mail server applications or related products.

What are SMTP Error Messages?
Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (e-mail) transmission. SMTP protocol is used for sending e-mail messages between servers. Most e-mail systems that send mail over the Internet use SMTP to send messages from one server to another; the messages can then be retrieved with an e-mail client using either POP or IMAP.

In general, each SMTP error contains the following information:
• The SMTP Status Code or SMTP Error Codes or SMTP Reply Codes
• The message text. This text is usually returned with the Error code. Some messages employ word substitution, where the word substituted represents the system-replacement of a term more specific to the occurrence.
• An explanation of how the error may have occurred.

Hope this was helpful.

SQLServerF1 Team
Information about SMTP Error Codes or Status Codes and Error Messages on Windows, Linux Operating Systems.


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