We have so many email service providers and all offer different services. Some of them offer you to customize your email signature but for some it is not an easy process as it requires you to know some basic html.
There is a plugin for your browser which can easily take care of your signature and it also allows to you customize your signature with many interesting things. You can add icons for your Facebook profile, Twitter page, YouTube channel, LinkedIn profile and many more. You can have a look at all the email applications which are offered by WiseStamp.
Quick Tour of WiseStamp
To use WiseStamp plugin you need to install it on your browser.