Email was working then stopped working

Email was working then stopped working on two different sites on same account. Nothing was changed by anyone on our team

We have had Cloudflare for a while. Today I was updating the plugins on our staging site and out of nowhere the mails stopped working. Not just on the domain that staging site is on, but also on a completely different domain that is also on this same account on Cloudflare. Is there some sort of firewall or setting that could have changed from a conflict with one of the plug ins?

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