Connection Failure: <-7>
Enter a different port number and test again. Common ports include 465, 587 and 25.
Connection Failure: <-10>
E-mail Server Not Set up.
Validate CA is turned On when it should be turned Off or the opposite way.
Username entered incorrectly.
Try the opposing setting and test again.
Try both the full name; e.g., email@example.com, and then just the username; e.g., test, and test again.
Connection Failure: <-11>
Cannot resolve server address.
Incorrect SMTP Server Address
Network communication problem
Printer communication problem
Enter the SMTP server address, and test again.
Contact your internet service provider to identify a problem with the wide area network (WAN). Can you access the web?
Test network-printer communication by opening the printer web page and printing a page or scanning a document to a PC.
Connection Failure: <-19>
Incorrect Port or SSL/TLS setting
Contact your ESP and verify SSL/TLS and Port combination, and test again.
Connection Failure: <-52>
Error sending to an e-mail connection failure -52 self time certificate.
Validate CA has been checked.
Uncheck the "Validate CA" tickbox.
Access printer EWS > go to Settings > E-mail/FTP Settings > E-mail Settings > Setup E-mail Server > clear Validate CA
Connection Failure <504>
SMTP Server Authentication set to "NTLM"
Unrecognized Authentication Type. Change Authentication to applicable Plain/Login or None.
Connection Failure: <530>
Enable SSL/TLSis turned Off when it's actually required.
SMTP Server Authentication is set to No Authentication Required "None".
Set to Negotiate or Required and test again.
Set Authentication to applicable setting and test again. (Plain/Login, or NTLM.)
Authorization failed <534>
Enable your Gmail account access for less secure apps. To do so:
Go to https://support.google.com/accounts/.
Click Account security > Suspicious activity.
Click Allowing less secure apps to access your account.
Under Access your account, click Allow less secure apps.
Select Turn On.
Connection Failure <535>
Username and Password not accepted.
Change Username and Password and test again.
Again, some ESPs require full e-mail address (firstname.lastname@example.org) and others require only the beginning Userid (hello) portion of the e-mail address.
Passwords are sensitive to spelling, capitalization, and the use of symbols and characters.