When an email doesn't go out

Part of the key was missed when you copied it, or it was deleted in Cloudflare.

Fix: On the Settings tab, click Disconnect. Then make a new key with Create your key and connect again.

The key is missing the Email Sending permission.

Fix: Make a new key with Create your key. Before you click Create Token, check that the list shows Email Sending.

Emails won't keep a key that could change your website.

Fix: Make a new key with Create your key. That key can only send emails.

Fix: Make a new key with Create your key. It makes a key for just one account.

Usually, the part after the @ in your address hasn't been added in Cloudflare yet.

Fix: Click Open Email Sending, then Onboard Domain, and pick your address. Also check that the address you're sending to is right.

Fix: Open Email Sending in Cloudflare and add your address. See step 2 of Getting started.

Cloudflare pauses sending when too many emails bounce or get marked as spam.

Fix: Open Email Sending in Cloudflare. It says why, and what to do.

The address doesn't exist, or can't get email.

Fix: Check that the address is typed right.

Cloudflare won't send to an address that bounced before.

Fix: If the address works now, remove it from the list in Cloudflare Email Sending.

Apps like Forms sent their 200 emails for today. The rest go out tomorrow. Sign-in links still go out.

Fix: If the emails are real, raise the limit on the Settings tab. See Which emails are sent.

Fix: Open Emails in your admin and connect it. See Getting started.

Cloudflare had a short problem, or your website sent a lot of emails at the same moment.

Fix: Wait a minute and try again.

Fix: Keep each email, with attachments, under 25 MB.