When attempting to send a test email from the Mail Service configuration, the following error message is thrown,
5.7.0 Too Many Unauthenticated commands
When accessing a Mail Service configuration, if you immediately try to send a test email, it will fail because the password has not been entered. The password textbox will be empty, which makes it necessary to enter it again before sending a test email.
Once the password has been entered, select Save then you should be able to send the test email.
KBA is applicable to both Cloud and On-Premise systems.
こちらの記事は右記のDocuWareバージョンで有効です： 7 7.1 7.2 7.3 7.4 7.5 7.6 | 5.7.0 Too Many Unauthenticated commands