SMTP Status Codes and Error Messages from Error 101 to 214


SMTP status code 101 – Cannot open connection
(SMTP Error 1.0.1)
SMTP Error 101 : Typically your SMTP server or email
program is unable to even start an SMTP session. Typical
replies will be “SMTP Error 101, Error opening connection”
or “SMTP Error 101, cannot open SMTP stream”.
All SMTP Error 101 errors usually point to a configuration
problem, such as an incorrectly spelt SMTP server, or an
IP address that does not exist, or an SMTP port that does
not exist or which the recipient will not accept SMTP
connections on, or some other process is already using the
default SMTP port, port 25.

SMTP status code 111 – Connection refused
(SMTP Error 1.1.1)
SMTP Error 111 : Typically from Linux based email
systems such as SquirrelMail and Mailman. The message
will usually go like this : “Connection refused, 111 Can’t
open SMTP stream”.
All SMTP Error 111 errors usually point to an inability of
your server to communicate with the remote SMTP server
(either the recipient’s SMTP server or your ISP’s SMTP
server) or to a Linux/SMTP software configuration problem,
typically /etc/hosts not being world readable, or a
newly installed or reconfigured firewall preventing
connection to the remote SMTP server, or incorrect
hostnames and/or domains (e.g. does your sending
hostname match your IP address in a reverse lookup?), or
exim not running. Telnet and logs should help you home
in on the problem.

SMTP status code 211 – System Status
message or System
Help Reply
(SMTP Error 2.1.1)
SMTP Error 211 : SMTP status 211 prefaces a message
about the Mail Server status or a System Help reply to the
user requesting help information. You might for example
issue a command to the mail server to display a list of
commands you can use and the server replies with an
SMTP Reply 211 followed by the list you requested.

SMTP status code 214 – Help Reply message
(SMTP Error 2.1.4)
SMTP Error 214 : SMTP status 214 is usually in reply to
the “HELP” command. It displays information about the
server, usually a URL to the FAQ page of the SMTP
software running on the server. As a result this “error” is
normally called a reply, as in SMTP Reply 214.

Above are list of SMTP Errors Codes and Status Codes along with Error and Warning messages from Error 101 to 214 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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