Send email marketing campaigns to 10K people with Gmail: GMass

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GMass is a web app which uses Gmail and Google Sheets to deliver email marketing campaigns to 10,000 people. It allows for personalization of each email, scheduling, and tracking of "opens" and "clicks".  It is also possible to create email lists based on search results and to send emails as replies to the last conversation you have had with anyone of your contacts. Finally, it is possible to set automatic follow-up emails to be sent sequentially until you get a reply.

100% free.

My comment: Very powerful and free (for now) system to send emails via Google. 

Try it out now: https://www.gmass.co/