In the past 3 weeks I'm facing issues with users (servers) that want to send emails from Gsuite accounts (worked well in the past, no changes in settings).
when I'm trying to update the server details + I'm getting this long message:
When I loggin to the Gmail, all works well, so password is correct 101%;
Here's a screenshot of the settings, again, no changes:

when I'm trying to update the server details + I'm getting this long message:
When I loggin to the Gmail, all works well, so password is correct 101%;
Code:
Cannot send the confirmation email using the data you provided.
×
Here is a transcript of the error message:
Failed to authenticate on SMTP server with username "office@mydomain.com" using the following authenticators: "LOGIN", "PLAIN", "XOAUTH2". Authenticator "LOGIN" returned "Expected response code "235" but got code "535", with message "535-5.7.8 Username and Password not accepted. For more information, go to
535 5.7.8 https://support.google.com/mail/?p=BadCredentials 5614622812f47-40678d02038sm394860b6e.44 - gsmtp".". Authenticator "PLAIN" returned "Expected response code "235" but got code "535", with message "535-5.7.8 Username and Password not accepted. For more information, go to
535 5.7.8 https://support.google.com/mail/?p=BadCredentials 5614622812f47-40678d02038sm394860b6e.44 - gsmtp".". Authenticator "XOAUTH2" returned "Expected response code "235" but got code "334", with message "334 eyJzdGF0dXMiOiI0MDAiLCJzY2hlbWVzIjoiQmVhcmVyIiwic2NvcGUiOiJodHRwczovL21haWwuZ29vZ2xlLmNvbS8ifQ==".".
Here's a screenshot of the settings, again, no changes:
