Switch from Fastmail to Tuta: step by step

How to move your mail, contacts and address from Fastmail to Tuta without losing anything. Most moves take an evening to set up, then a few weeks of forwarding.

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1. Before you start

   • Check where your address lives. If it ends in @fastmail.com, it belongs to Fastmail and stays there: you'll forward your mail and tell people your new address. If it's on your own domain, like you@yourname.co.uk, it comes with you: you'll change a few DNS settings.
   • Check the space you need. See how much mail you have in Fastmail, and compare it with Tuta's plans (the cheapest is Revolutionary, About €3 a month, yearly, with 20 GB).
   • Read the small print. Tuta's page covers exporting, cancelling and refunds under "Before you sign up".

2. Open your Tuta account

   Sign up on Tuta's website (Free plan), and turn on two-step sign-in straight away. You'll find the link on Tuta's page: Tuta.

3. Bring your mail across

   Export, then import. First save your mail as files: Works with standard mail apps (IMAP), such as Outlook or iPhone Mail, so you can copy your mail out. Fastmail's guide ↗

   Then bring them in: Tuta imports .eml and .mbox files in its desktop app (Settings, then Email import), on the Legend and Unlimited plans.

   Your old mail stays where it is while it's copied, so nothing is lost if you need to start again.

4. Move your contacts and calendar

   Export your contacts as a .vcf file and each calendar as an .ics file from Fastmail, then import them into Tuta. Most providers have both options in their contacts and calendar settings.

5. Keep your @fastmail.com address working

   1. Forward new mail. Look in Fastmail's settings for automatic forwarding, and add your new address.
   2. Tell people. Send your new address to the people who matter, and add it to your email signature.
   3. Update your sign-ins. Change the email address on your bank, shopping, social and work accounts. A password manager's list of saved sign-ins is the quickest checklist.
   4. Keep the old account open for a while. Mail will keep arriving there for months. Sign in now and then so it isn't closed for not being used.

6. If you use your own domain

   Your address moves with you. Do this after your mail has been copied:

   1. Add your domain in Tuta's settings, and create the same addresses there.
   2. A day before, lower the TTL on your domain's MX records (to 300 seconds, say), so the change takes effect quickly.
   3. Replace the MX records with Tuta's, and swap Fastmail's entry in your SPF record for Tuta's.
   4. Add Tuta's DKIM record, and keep your DMARC record.
   5. Check the result with a free DNS checker before you rely on it.

   Not sure what these mean? See my email glossary.

7. Check everything arrived

   • Compare the number of emails in each folder on both sides.
   • Send a test email to your new address from another account, and reply to it.
   • Check that mail forwarded from Fastmail is arriving, and isn't going to spam.

8. Close Fastmail, when you're ready

   Wait at least a month, until nothing new arrives there. On a free account you can leave it open with forwarding on instead. Before you close a paid account, download a last copy of your mail.

   • Cancelling: Change plans or cancel at any time.
   • Refunds: Refunds are at Fastmail's discretion; they don't have to refund prepaid fees if you stop using it.

   From Fastmail's page: Fastmail.

I checked the providers' help pages on 24 October 2026. Menus move, so if a step doesn't match what you see, tell me and I'll update it.

Moving to Tuta from somewhere else? Gmail to Tuta · Outlook.com to Tuta · iCloud Mail to Tuta · Proton Mail to Tuta · mailbox.org to Tuta · Posteo to Tuta · All switching guides