By 
The recent introduction of the General Data Protection Regulation (GDPR) has had a direct impact on marketing practices, including email marketing. Is email marketing still one of the most effective marketing tools for your business?
The answer is yes, email marketing is still one of the most effective tools for driving sales in your business, but as with most forms of marketing, it rarely stops.
Be sure to comply
Personal privacy is one of the top concerns today when it comes to email marketing. So is how you use the data you collect. Please read your current privacy policy and website terms of service to ensure it is up to date.
Mobile-friendly emails
Your email must be readable on whatever device your subscriber chooses to read it on. You can check how your emails and website look on free tools like mobiletest.me and responsinator.com to view your content on a variety of simulated screens.
email representation
There is a similar issue with the way emails appear on different email services. Check the overall appearance of your emails on Yahoo! Email, Gmail, Hotmail, etc. to make sure it doesn’t look bad.
Coding Issues
Some marketers prefer HTML-encoded emails, while others opt for plain text. Any HTML coding error could ruin the appearance of the email, or even prevent all or part of it from being viewed. Check your code on a site like Dirty Markup and clean up any errors.
check and test
Be sure to carefully review any email before sending it. Look for typos and make sure the link clicks to the correct page. Make sure things like the date and time of an event are correct. People are very busy and don’t have time for you to send two or three emails on the same topic, trying to fix basic bugs that you should have found in the first place.
Send High quality Information, not just sales information
Make sure all your emails are relevant and interesting to your target audience. Do more than just sell them stuff, and chances are they’ll stay on your list, wait for your emails and open them, and even forward the emails to other people.
Make it easy for people to unsubscribe
If your subscriber decides they don’t want to receive any more emails from you, make it easy for them to unsubscribe. If you make it hard, they will start to envy your emails and will certainly never buy from you. They can also report you as spam, which will lead to complications in the future.