Email marketing is now a very popular offshoot of direct mail marketing (See also Email Marketing). However, it’s worth bearing in mind that 37 states now have laws regarding “spam,” or unwanted junk email. Therefore, companies that wish to maintain a positive reputation use an “opt-in” policy for marketing email, targeting only interested customers.

Consider sharing the focus of the email between the call to action you want from your user and offering them something like a discount, early access to a new product, or a free trial period for subscription-based services. Get creative here. Give serious thought to what your customers will find valuable. No one knows their needs better than you and don’t be scared to do some research into what they’d want.
Digital marketing activity is still growing across the world according to the headline global marketing index. A study published in September 2018, found that global outlays on digital marketing tactics are approaching $100 billion.[40] Digital media continues to rapidly grow; while the marketing budgets are expanding, traditional media is declining (World Economics, 2015).[41] Digital media helps brands reach consumers to engage with their product or service in a personalised way. Five areas, which are outlined as current industry practices that are often ineffective are prioritizing clicks, balancing search and display, understanding mobiles, targeting, viewability, brand safety and invalid traffic, and cross-platform measurement (Whiteside, 2016).[42] Why these practices are ineffective and some ways around making these aspects effective are discussed surrounding the following points.
Due to the massive growth of the Internet, most countries have passed legislation to prevent companies from sending unsolicited emails. These laws determine what is and what is not considered acceptable email correspondence, and enforce restrictions on email communications. In the United States and Europe, for example, bulk email must contain an accurate from field and subject line, and the email content must include the sender’s physical address. In addition, a blast email must also offer its recipients the opportunity to unsubscribe from the email list — and such requests must be met within a specified period of time. As a result of these laws, it is very important for companies to maintain an updated list of subscriptions and cancellations at all times, and avoid sending out email that appears to be spam.
The recipient of your email blast is unlikely to commit a lot of time to reading what you send. If you keep the content short, make it easy to scan and easy for them to digest, it will be a much better value for both of you. Aim the content toward providing the reader with enough info to get them interested and then encourage them to follow the links to learn more.
If you sign up for something and the terms include words like "Sign up to receive updates from us and our partners that we think you'll like," your email address is likely being collected for a shared or sold list. A subset of this method is called co-registration. This is where you sign up at a website, but that website also automatically, or nearly automatically, signs you up for other sites. They try to legitimize this by informing you of the additional subscriptions, or providing boxes to uncheck. This is a situation where it's not the subscriber’s intention to sign up for the material they will be receiving.
Another type of electronic mailing list is a discussion list, in which any subscriber may post. On a discussion list, a subscriber uses the mailing list to send messages to all the other subscribers, who may answer in similar fashion. Thus, actual discussion and information exchanges can happen. Mailing lists of this type are usually topic-oriented (for example, politics, scientific discussion, health problems, joke contests), and the topic may range from extremely narrow to "whatever you think could interest us". In this they are similar to Usenet newsgroups, another form of discussion group that may have an aversion to off-topic messages.

In practice, Internet marketing will include the use of a company web site in conjunction with online promotional techniques described in Chapter 8 of the book such as search engine marketing, interactive advertising, e-mail marketing and partnership arrangements (affiliate marketing) with other web sites. Some businesses who "want to be top in Google", simply consider Internet marketing to simply equate to Search Engine Marketing, but while this is important this scope is too narrow to take full advantage of digital media. http://www.mailigen.com/blog/wp-content/uploads/2017/01/guest-blog-feature-1.2.32.png
Particular groups of customers can be targeted or even individuals. Offering individual customers special deals on merchandise and/or services on the customer's birthday, for instance, is one example of email marketing personalization. (A restaurant might send an email to customers on their birthday offering 50% off an entree,) Email marketing helps a business develop and maintain a relationship with a customer over time that hopefully results in increased sales and increased customer loyalty. 
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