Four lines is considered acceptable for a signature.
Attaching “signatures” to the end of your e-mail messages is a great way to identify yourself, but how many times have you seen long, drawn-out signatures including addresses, contact numbers, web sites, and personal quotes? Proper net etiquette (or “netiquette”) suggests that you should keep your signatures four lines in length or shorter. An example of a good e-mail signature is one that includes your name, your e-mail address, and your affiliation with a company or organization. Of course, remember to keep personal or sensitive information out of the signature.
Formerly part of Computer Currents, Stephen J. Bigelow’s Computer Advisor column has been resurrected on computeruser.com as a daily tech tip column. Find Stephen at www.dlspubs.com.