Sendgrid have a HUGE problem with spammers using their service. I've probably reported 20 SPAM campaigns using their official channels, but I think they route s

Sendgrid have a HUGE problem with spammers using their service. I've probably reported 20 SPAM campaigns using their official channels, but I think they route such e-mails to /dev/null. Never gotten a response- just more SPAM through their service. And I can't block their IPs, as a lot of legitimate sites utilize their services.