The email signature is set, so you can't see the signature when you write an email. There are two situations: 1. After installing the mail signature, you must first close the mail software and then reopen the mail software to see the mail signature; 2. Before installing the map business card e-mail signature, your e-mail signature was damaged. At this time, you need to delete the damaged email signature first, and then reinstall the email signature of the map business card. After the installation, repeat the operation of 1. (The above content is only applicable to Guangdong Unicom users)