User did not receive email - What to do?

[hugetim]

On a quick forum search, I found a couple potentially related reports:

@jshaffstall

I recently set a custom from address to match my domain for user related emails: password resets & email confirmations.

That led to the strange situation where emails sent from my debug environment arrived fine, but emails sent from any other environment did not arrive. After a brief exchange with Anvil support, it turns out my DMARC policy was causing those emails to be rejected.

@danbolinson

We have occasional email deliverability issues. Sometimes users (claim to) never receive an email verification email.