Avoid Twilio's SendGrid if you are a small-to-medium business by email volume. We've been a paying customer for over 5 years with perfect score, but today was a major disappointment.We've noticed an unexpectedly high bounce rate of 64% on a recent email campaign (with usual being 0-3%). Quick check of logs showed that SendGrid's IP that was assigned to us was put on a blocklist by SpamHaus, rendering more than half of our deliveries useless.Quick check on SpamHaus showed that since 3rd of Sept many spam & phishing attacks originated from another SendGrid client that was assigned same IP. Not sure for how long we've been sharing it and how much business we've lost as a result, but should be a quick fix I thought.I reached out to SendGrid asking to be moved to a different IP. Within a few hours I finally get a response admitting that it is indeed a common problem atSendGrid, but despite being a paying customer I cannot be moved to a different IP address. My two only options would be:1) Wait it out until we are automatically rotated to a different IP address (days? weeks? months?).2) Pay up for a Pro account with a dedicated IP address.So Sendgrid knows they have an IP that's causing major disruption to their paying clients as a result of poor vetting & monitoring process, but instead tells you to wait it out or pay up.
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