The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 Client not authenticated to send mail. Error: 535 5.7.139

Hello,

I am currently doing processing EFT. After completing the EFT processing, I select the option “EFT Transaction Reports” to print and send the reports.

However, the following error appears when the system tries to email the reports:

“Error emailing [email protected]. The SMTP server requires a secure connection, or the client was not authenticated. The server response was: 5.7.57 Client not authenticated to send mail. Error: 535 5.7.139.”

All emails are failing to send.

Could you please advise what could be causing this issue and how it can be resolved?

Thank you.

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