Proper permission to email your contacts is required by Smart Newsletter and will greatly contribute to the success of not only your newsletter but any other email marketing campaign.
Sending to contacts who have not expressly permitted you to email them can result in serious consequences such as SPAM reports, IP blacklists, and violating anti-SPAM laws. Read more about Anti-SPAM requirements and deliverability considerations here.
In addition to having proper permission to send emails to your contacts, we also strongly encourage you to maintain a clean subscriber list.
Smart Newsletter is an organization operating within the United States, but depending on where your contacts reside, you might have to abide by additional international email send requirements. If your own organization is based outside of the U.S. or the people you are emailing primarily reside outside of the U.S., you will need to consider those respective international laws in your email campaigns.