What is SASL login authentication failed?
1 Answer. To explain, the SASL authentication failed messages are from the remote server. It's saying that there's a process somewhere on, or behind, your IP address that is pounding that server trying to guess passwords, in order to send spam.
What is SASL error?
“SASL login authentication failed generic failure” error mainly happens due to wrong configuration of authentication mechanism in mail server. Today, we've seen the causes for the error and how our Support Engineers fix it.