Is the subject asking about the signature file settings?

the general contact method is to contact you directly through the email address where you sent the email.

You can also mark your mobile phone, telephone number, fax number, address and so on in the signature file. In this way, people who receive your email can find you in many ways.

Right-click at the bottom of the new email to see the signature management option, and you can also find the signature settings in the personal settings

It depends on what email client you are using. Just find the signature management to set the specific information.