To make sure you're only sending emails to the people who want to read them, clean up your email list so that it excludes recipients who haven't opened a certain amount of emails in the campaign's recent history. This makes sure your emails' open and clickthrough rates reflect only your most interested readers, allowing you to collect more effective data on what is and isn't working in each email you send.
An impression in most of the cases cannot be created by one attempt. Here consistency is the key. If you are not consistent you will fail to make your mark in the mind of the customer. Here a threat of being a spammer is most prevalent but if you are using legitimate options you can overcome it. So work hard to keep yourself regular as doing so almost always leads to a greater number of sales.
In addition to satisfying legal requirements, email service providers (ESPs) began to help customers establish and manage their own email marketing campaigns. The service providers supply email templates and general best practices, as well as methods for handling subscriptions and cancellations automatically. Some ESPs will provide insight and assistance with deliverability issues for major email providers. They also provide statistics pertaining to the number of messages received and opened, and whether the recipients clicked on any links within the messages.