At Twilio SendGrid, we work with A large number of organizations that send amongst 1 and 5 million emails a month and, over time, we’ve figured out what will work and (more importantly) what doesn’t. Sending unengaging or unsolicited content will increase the probability that the recipients will mark https://mariouccaw.blogoscience.com/32719297/5-simple-techniques-for-bulk-email-blast