v8.1.41
The OAuth2 client authorization test is successful.
The OAuth2 client token test is successful.
Test Email response:
javax.mail.AuthenticationFailedException: 555-5.5.2 Syntax error, goodbye. For more information, go to
555-5.5.2 About SMTP error messages - Google Workspace Admin Help and review RFC 5321
555 5.5.2 specifications. 46e09a7af769-708f60a5325sm1569445a34.6 - gsmtp
RFC 5321, from 2008:
4.1.1.11
If the server SMTP does not recognize or cannot implement one or more of the parameters associated with a particular MAIL FROM or RCPT TO command, it will return code 555.
The syntax error is thrown when testing with from/to addresses foo@bar.com
Testing email with a Classic SMTP profile and the same address is successful.
The RFC suggest formatting the to/from addresses as foo@bar.com which doesn't work, the same syntax error is thrown.
Has anyone encountered this issue?
Thank you.