SMTP Status Codes and Error Messages from Error 554
SMTP status code – 554 – Transaction failed. Nowadays SMTP status 554 is in most cases returned when the recipient server believes your email is spam or your IP address or ISP server
has been blacklisted on one or more Internet blacklists. or With Yahoo, on the other hand, this usually means the email address does not exist or has been disabled.
or With IBM’s Lotus Domino this is either a Domino bug or a Disk Full error
(also called SMTP Error 5.5.4)
SMTP Error 554 : There was a permanent error trying to
complete the mail transaction which will not be resolved by
resending the message in its current form. Some change
to the message and/or destination must be made for
For instance, Yahoo often returns the following if the
recipient email address does not exist on the Yahoo
systems : “554 delivery error: This user doesn’t have a
Yahoo.com account”. Another typical Yahoo SMTP Error
554 reply is : “554 delivery error: Sorry your message to
<Email-Address> cannot be delivered. This account has
been disabled or discontinued”.
In the case of an IBM Lotus Domino server on the other
hand, this is either a disk full error (the first thing to
check), or a Lotus Domino bug which has appeared in
various guises in many versions of Lotus Domino as far
back as 2002. Eight years, Eight years and counting and
IBM still suffer from this bug – the mind boggles ! Click
on this link to read the latest IBM Knowledgebase article
on this error at the time of writing :
In most other cases, however, a recipient mail server will
return an SMTP REPLY 554 when its anti-spam firewall
does not like the sender’s email address, or the
sender’s IP address, or the sender’s ISP server
(because, for example, they are listed in an RBL) and
where you will therefore either need to have the sender
whitelist you in their anti-spam program/appliance, or,
worse, you will need to take steps to have either your IP
address or your ISP’s servers (if you send mail through
your ISP) de-listed from one or more RBLs (RBL =
Realtime Blackhole List – also called Realtime Blacklist
For example, a 554 error returned by a Comcast server
might look like this : “Username@comcast.net SMTP error
from remote mail server after initial connection : host
554 IMTA11.emeryville.ca.mail.comcast.net <Your-serverIP-address>
was found on one or more DNSBLs, see
DNSBLs = DNS Blacklists. In this case, therefore, if you
get such a message back it is telling you your IP address,
or your ISP’s mail server is listed on one of the anti-spam
blacklist databases that Comcast uses to filter out spam on
incoming emails to Comcast mailboxes – click the link
provided in the error message to see how you may be able
to un-blacklist yourself as far as Comcast is concerned. Here is another example from the OZEMAIL ISP in
Australia, “SMTP error from remote mail server after initial
connection to host mx1.ozemail.com.au :
554 filter.ozemail.com.au” – not very informative, as you
can see, but the name of the server returning the SMTP
reply 554 is what gives this away as OZEMAIL’s anti-spam
not liking you : filter.ozemail.com.au. “Filter” in the
name of a recipient server is almost always an indication
that that server is an anti-spam and antivirus server.
And here is a Twitter example : “SMTP error: Email
Error: RCPT TO invalid mail server response:
554 5.7.1 : Recipient address rejected”.
Note that SMTP Error 554 can also often be buried in the
middle of SMTP Error 550 errors. Here is an example of a
recipient mail server returning an SMTP Error 554 because
its Barracuda anti-spam firewall appliance rejected the
Above are list of SMTP Errors Codes and Status Codes along with Error and Warning messages from Error 554 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.
Information about SMTP Error Codes or Status Codes and Error Messages on Windows, Linux Operating Systems.