Create a signature in Horde Webmail by following the steps below:
1. On the icon bar at the very top of any mail page in the Horde WebMail application, click on the options icon
2. In the Your Information column, click Personal Information.
3. On the Personal Information page, click Edit Your Identities.
4. Select the Default identity from the Your Identities pop-up menu, type your signature text, and click the Create button.
5. Confirmation that the change you have made to your default identity will appear at the top of your window stating “adding a signature file.”
Roundcube:
Create a signature in RoundCube by following these steps:
1. Click on “Settings” at the top right side of the page.
2. On the Settings page, click on the “Identities” Tab.
3. Double click on the email address that you want to create a signature for.
Add your signature.
SquirrelMail:
Create a signature in SquirrelMail, in the Personal Information section, by following the steps below:
1. First, log into your SquirrelMail.
2. Click on Options at the top of the screen.
3. Click on “Personal Information.”
4. On the next screen you will be able to insert your signature.