Transmit 

// BRIEF

Most email providers have a dirty secret: they pool thousands of customers onto shared IP addresses. When one sender on that IP gets flagged for spam, the reputation hit affects everyone. Your carefully crafted transactional emails start landing in spam folders, not because of anything you did, but because a stranger on your shared IP was sending junk. SendGrid's shared IPs were blocked by Microsoft for 36 hours. About 17.5% of emails on shared infrastructure route to spam globally. Transmit wa