There are a multitude of error codes which can appear as a result of emails not sending from Live.
Below is the list of error codes which will be useful to pass on to your IT depending on what the issue is.
SMTP Error 1. An Unknown Error has occurred. - Usually not encountered. When sending mail if something that was a part of the mail being sent, is no longer available. (I.e. If they were sending an email with an attachment, and the attachment has been deleted or is no longer accessible.)
SMTP Error 2. An error has resulted because there was no message specified. - Usually caused if the SMTP cycle is running but no e-mail is provided. Very unlikely to encounter this error.
SMTP Error 3. The Process has run out of memory. - Exactly as it sounds. Can be rectified by sending fewer/smaller mails.
SMTP Error 4. An error has occurred due to a problem with the message body or the attachments. Either the message or an attachment is invalid (usually corrupt)
SMTP Error 5. There was a problem initiating the conversation with the SMTP server. Could be networking/SMTP server having problems.
SMTP Error 6. There was an error terminating the conversation with the SMTP mail Server. Unlikely to experience this. Would be an SMTP server issue.
SMTP Error 7. The From address was not formatted correctly or was rejected by the SMTP mail server. - Some SMTP mail servers will only accept mail from particular addresses or domains. SMTP mail servers may also reject a From address if the server cannot successfully do a reverse lookup on the From address. So, either the sending address is the wrong format, or the SMTP server isn’t setup correctly.
SMTP Error 8. Can be one of Two things:
It mean that an error was reported in response to a recipient address. The SMTP server may refuse to handle mail for unknown recipients. One of the most common messages. Usually means the address the mail is being sent to is invalid, or is being rejected by the SMTP server for some reason. .
It can also mean "Unable to Relay". This means the SMTP server is not configured correctly to enable the user to send. Depending on how their server is configured, depends on the solution. It can ONLY be fixed by changing settings on the server, or the client giving us a different SMTP server to use.
Examples of what's wrong on the server include Unauthorised Relaying disabled (if they arent using a Username and Password), restricting access via IP, restricting access via E-mail address.
SMTP Error 9. There was an error connecting to the SMTP mail server. Probably the most common message. The SMTP setting in Live is incorrect. Its either pointing somewhere that isn’t an SMTP server, the SMTP server isn’t running correctly on that PC or the software cant connect to that PC via port 25.
SMTP Error 10. There was an error opening a file. - If you have specified file attachments, ensure that they exist and that they can be accessed. (The file may have been moved, deleted, or have incorrect permissions)
SMTP Error 11. There was an error reading the file. - If you have specified file attachments, ensure that they exist and that they can be accessed. (The file may have been moved, deleted, or have incorrect permissions, or be corrupted)
SMTP Error 12. There was an error writing to a file. Usually a disk space issue.
SMTP Error 15. No mail server specified. Exactly as it sounds, but you shouldn’t get this as the software won’t let you send a mail, if there isn’t a server setup.
SMTP Error 16. Could not create socket. Networking error. Something is blocking the connection, or the SMTP server software is not configured correctly.
SMTP Error 17. Could not resolve host. Networking error. Can’t reach the server name.
SMTP Error 18. Connected but server sent back a bad response. - Server error. The admin of the SMTP server will need to check its logs to find out what the problem is.
SMTP Error 19. Could not create thread. General error. Highly unlikely to get this.
SMTP Error 21. The Operation timed-out while the host was being resolved - Networking error.
SMTP Error 22. The operating timed-out while connecting - Networking error, or possibly slow/congested connection, or the server itself was busy.
SMTP Error 24. The ESMTP Authentication failed - The username and/or the password provided are incorrect.
SMTP Error 25. The selected ESMTP Authentication mode is not supported by the server - The SMTP server is not configured correctly. It will be using an incorrect authentication type.
SMTP Error 30: This is one of two things. Either the Configuration we have been given for the server is incorrect (i.e TLS ticked when it's not needed, SSL ticked when it's not needed etc). Additionally, if this message is intermittent, this means the server is rejecting mails for some reason.