After logging in to the msn mailbox on the webpage, the email exit button is in the upper right corner of the webpage, the word option is slightly lower, and there is an icon with a question mark. Say hello is to help, leave it alone. When you click on an option or a small triangle, a drop-down menu will appear. You can select "More Options" in it. After the webpage is opened, the third item, which is the red part, is the custom email. The fourth sub-item below is "Personal Signature of E-mail". You just put it in there.

So are other mailboxes. Look for it in options or management or settings, and you will definitely find it. You can set automatic reply, automatic forwarding and the like.