Adding MX records to Cloudflare

These instructions are for users who are hosting their domain on Cloudflare and would like to change their mail records (MX) so they can send and receive mail with Fastmail.

This guide covers three steps to setting up your domain:

  1. Add your domain to Fastmail
  2. Edit your MX records in Cloudflare
  3. Signing your domain

Advanced instructions for setting up MX records can be found here.

1. Add your domain to Fastmail

We have a setup guide to help you get your domain working as quickly and easily as possible.

After you have activated your domain at Cloudflare, log in to Fastmail and go to the Settings → Domains screen.

Add your domain(s) (e.g. Using the Add Domain button brings up the new domain screen. Type your domain into the text box.

If your domain is active at Cloudflare, we will display this on the next screen. You can also choose Cloudflare from our list of supported registrars.

Follow the wizard to add your email addresses to Fastmail. To have the wizard provide you with steps to update your MX records by default, choose Yes when you are asked if you have a website.

Please note: The domain setup wizard can only set up aliases on legacy plans. If you are on a legacy plan, you will need to add users manually in order to create additional user accounts at your custom domain.

2. Edit your MX records in Cloudflare

Note: We recommend making these changes at a time that you do not expect much mail to be sent to your domain

NameMail serverPriority
@ 10
NameMail serverPriority
@ 20

You should now have two MX records, and

3. Signing your domain

Your domain should now be ready to receive messages. In order to make sure your sent messages reach your recipients, there are a couple more records to add in your Cloudflare account.

CNAME fm1._domainkey fm1.{}
CNAME fm2._domainkey fm2.{}
CNAME fm3._domainkey fm3.{}

You can leave any other CNAME records you have for your domain where they are.

TXT @ v=spf1 ?all

When you are finished, it should look like this (with your domain name in the blank space):

TXT record added to Namecheap

Once you have finished this step, your domain should be working with Fastmail.

To check all your settings are correct, log in to your Fastmail account and go to the Settings → Domains screen. Click Recheck DNS. Your domain should now say Active. MX records set.

Cloudflare has further instructions for using their DNS configuration panel available here.