Email Forwarding - Email forwarding is not allowed for this domain

My case was also escalated to more experienced technical support. Long-story-short they’re working on a platform level fix for this, so it’s going to require a fix, testing, and a major unscheduled deployment. So here’s what I did… Change you Shopify name servers to use CloudFlare, and then host all your DNS entries there. If you do this make sure you take a backup or some screenshots of all the entries in your Shopify DNS, and be prepared to change a few things to make it work correctly. This is super tricky if you have a site that’s already live. I’m guessing a lot of the people in this thread are building new sites - it’s less risky to do this if this is the case. If you’re not that familiar with how DNS work, find someone who can help so you don’t have downtime. Once you’re using the nameservers on CloudFlare (completely free), you’ll have access to a lot more reliable and advanced features. Hope this helps!