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535 Incorrect authentication data




Server says: 535 – Incorrect authentication data

Posted by Tom O'Leary

SMTP Error Code

Server says: 535 – Incorrect authentication data

Solution for Server says: 535 – Incorrect authentication data

A “Server says: 535 – Incorrect authentication data” error is usually related to the SMTP User Authentication details you have configured (or not configured) in your email settings.

If you continue to have problems after adding or modifying the SMTP User Authentication details in GroupMail, contact the host of the mail server you are using to relay your email to explain the error and to  confirm the details that you have entered.

As always, feel free to Addon Hosting  Support Team. They will be happy to help you to fix it.



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