1, not too much signature information. It is necessary to add a signature file at the end of the email. The signature file may include information such as name, position, company, telephone number, fax number, address, etc. , but the information should not be too many lines, generally not more than 4 lines. You just need to put some necessary information on it, and the other party will contact you if they need more detailed information. It is feasible to quote a sentence as part of your signature, such as your motto or company slogan. But to distinguish between the receiver and the occasion, remember to be decent. 3. Don't use only one signature file for internal, personal and familiar customers. The signature file should be simplified. An overly formal signature document will alienate the other party. You can set multiple signature files in OUTLOOK and call them flexibly. The text of the signature file should match the main text, including simplified, traditional or English, to avoid garbled characters. The font size should usually be smaller than the text font.