Same story here, but being a Sendgrid customer for 6+ years, suddenly the shared IP is blocked as well. After opening a lot of support tickets and getting no response, I had to nag someone here in HN who mentioned working for Sendgrid, he escalated but the response was the same: pay a lot more to get what you used to have.
Migrated to Postmark right away and we've been a happy customer for 2+ years now.
Migrated to Postmark right away and we've been a happy customer for 2+ years now.