Why do you Get Spam Mails

Why do you Get Spam Mails
Why do you Get Spam Mails
All spam emails, you receive, are from both known and unknown sources. Let me share a good example of emails from known sources.  Few months I got my car serviced at a service center and upon their request, I filled the feedback form including my personal email ID. After few days I started receiving their promotional mails.
Steps to Stop Spam in Gmail:
1. User Specific blocking
2. Create filter with search
3. Report Google
4. Alias Tweaks