I read one article on email marketing.I want to share some important point as follow: Email marketing is one of the marketing activity like social media..email marketing include newsletter,adding signature to email.There are three aspect which make email marketing more effective and efficient tool: 1)Anybody can use email.creation of email account is free.no money required to get started.we need only list of contact and email program.once we make contact list,we can keep in touch them again and again. 2)It's a push technology.so,that we can convey our message to our customer,instead of waiting for them to contact us.we only need to decide content of message and when it to deliver. 3)It is a tool which follow on telemarketing campaign.we can send direct email and follow a week later. promotional email signature is an effective way to tell our customer who we are,what product we offer,how to contact us.functional signature is easier to used with customer who already know who we are and what our business. you can share your ideas related to this topic..