Error: sendgrid IP blocked

What's Causing This Error

It can occur if your mail server IP address has been included in a deny list, if your ISP has blocked you, or whether a filter has reported the message content on the recipient server. The "Reason for the Block" will provide a decent explanation. For example, your IP address may usually be deleted from a deny list, and some lists will do so automatically after a certain amount of time.

Here's How To Resolve It

• If you discover that your IP address has been added to a valid entity's deny list, you should submit a delisting request depending on your plan.
• Try to resolve the issues with the help of support.
• Get your own (dedicated) IP addresses. Because you have control over every email sent, this is likely to prevent bans, but it does come at a cost.