In a sense, such a mail sending rule is equivalent to a spam sending rule. Therefore, general mail client tools or network mailboxes will not provide such a circular and timed mail sending function. If you have this function, there will be more spam. You may think that you will only use it in your normal work, and others may not. So this function can only be disabled.

It is possible to set up a mail server. Then write your own program and send emails regularly. I am incompetent, and the software engineering is too poor to help you. ...