Updated: 09/03/2019 by Computer Hope

A signature may refer to any of the following:

1. A signature or signature block is data used for identification purposes most often found in e-mail messages. A signature may be as simple as the individual's name or alias, contain job description, company, e-mail address, position, phone number, URL, quote, or a joke. Below is an example of the Computer Hope signature sent with all our e-mails.

Computer Hope
Free computer help since 1998

In the picture below, is an example of a window that will appear when composing a new e-mail message. In our example, the signature is automatically inserted any type a new e-mail message is being composed.

E-mail message with signature

E-mail signature etiquette

  • Keep the signature as small and simple as possible. We suggest no more than four lines.
  • Your signature doesn't need to be a complete bio of yourself. If you have five different phone numbers, you shouldn't post all five of them in your signature. Often a cell phone number is enough.
  • Have a divider or empty lines between the signature and main message.
  • Don't advertise more than your web page. Everyone gets bombarded enough by e-mail solicitation.

2. Signatures are also often found on online communities and forums as a way for a user to identify themselves, something they enjoy, etc. Great examples of online signatures is on the Computer Hope forum.

3. When referring to a virus, a signature refers to a virus signature.

Digital signature, E-mail, E-mail terms, Forum, Sig