SMTP Status Codes and Error Messages from Error 523


SMTP status code – 523 – The Recipient’s mailbox cannot receive messages this big
(also called SMTP Error 5.2.3)
SMTP Status 523 : This error will be received when the
total size of the message you have sent (ie: message + all
of its attachments) exceeds the size limits on the
Recipient’s server. Many companies implement the good
practice of configuring their servers with limits on the size
of emails they can receive to prevent their systems running
out of space as a result of a spam attack where the spam

emails contain large attachments, or as a result of valid but
not very technically savvy senders sending enormous
scans (through not knowing that scanning at 1200dpi
rather than the usually perfectly usable and acceptable
300dpi, will create humongous attachments).

Check the size of the email you sent, and, specifically, the
size of the attachments you included, and consider splitting
your email into smaller emails. If that does not work, check
with the Recipient the maximum size of email they can
receive, and if that is still prohibitive then consider FTP
arrangements between you and the recipient.
SMTP Error 523 is often a secondary SMTP error code
rather than a primary error code, as in the following
examples : “SMTP Error 450 5.2.3 Message Size greater
than allowed by Remote Host” or “SMTP Error 552 5.2.3
Data size exceeds maximum permitted” or “SMTP Error
552 5.2.3 Message exceeds maximum fixed size”, and so
on ….

Above are list of SMTP Errors Codes and Status Codes along with Error and Warning messages from Error 523 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.


Leave a Reply

Your email address will not be published. Required fields are marked *