Anyone can report an email as spam. It can be as easy as clicking the "This is Spam" or "This is Junk" button in an email client.
People can lodge a complaint to:
The public can also report unsolicited email to third party reporting services, such as SpamCop, who will do the analysis and reporting for them.
Thank you for reaching out to the Community and I do apologize that you are receiving unwanted emails. So we can stop the account from doing this, please forward the email you received with a description to abuse(at)constantcontact(dot)com. Thank you so much for bringing this to our attention!