How to Migrate from Yahoo Mail to Proton Mail

Yahoo won't let another app sign in with your normal password, so the first thing to do is generate a one-time app password for Proton — that way it's ready to paste when you reach the import. Sign in to Yahoo, open your account and go to the Security tab, then:

1. Open External connections and choose Create app password
2. Name it something like Proton import and select Generate password
3. Copy the 16-character password Yahoo shows — you'll paste it into Proton in a moment, and it's only shown once

That's all you need from Yahoo — Proton fills in the mail server details for you. Treat the app password like a key to your inbox, and remove it once the import is finished (we'll remind you at the end).

With your app password ready, the rest happens inside Proton's settings. Once you're signed in to your Proton account:

1. Open the Settings menu (the cog) and choose All settings
2. Go to Import via Easy Switch

This is where Proton pulls in mail from another provider — the home base for the next few steps.

On Proton's Import via Easy Switch page, click the Yahoo button. Proton opens its import dialog already set to Yahoo — leave Emails ticked and select Continue. Because Yahoo needs an app password, Proton shows a quick reminder of how to get one, then asks for your credentials:

1. Email — your full Yahoo address
2. App password — the one you generated in step 1 (not your normal Yahoo password)

The mail server and port are filled in for you automatically. Click Next and Proton connects to your mailbox.

Proton scans your Yahoo mailbox and shows a Customize screen. You can pick which folders to bring across (or import everything), set a date range to skip very old mail, and apply a label so the imported messages are easy to find. When you're happy, start the import — it runs on Proton's servers in the background, so you can close the tab and it keeps going. You'll get an email when it's done.

Contacts come across as a separate import, so export them from Yahoo first. On a computer, head to mail.yahoo.com and sign in if you aren't already:

1. In the panel on the right, click Contacts, then switch to the All tab to show your full address book
2. Click the … (three-dot) menu and choose Export to CSV file
3. Save the .csv file somewhere safe — that's your whole Yahoo address book in one file, ready for the next step

Now bring that file into Proton. Back on the Import via Easy Switch page, click Yahoo, tick Contacts and select Continue. Proton reminds you it needs a CSV or vCard file (the one you just exported) — click Continue again to reach the Import contacts screen.

1. Click Choose a file and pick your contacts.csv
2. Select Import

Proton then shows the fields it found in the file so you can confirm the import in the next step.

Proton shows a quick preview so you can confirm each column lines up with the right field — names, email addresses, phone numbers. Fix any that are mismatched, then confirm. Your Yahoo contacts land in Proton Contacts, ready to use.

Last one — your calendar. Like contacts, you export it from Yahoo as an .ics file. From mail.yahoo.com:

1. In the right-hand panel, click More and choose Calendar
2. In My calendars, hover a calendar and click the dropdown arrow next to it, then choose Export
3. Confirm Export and save the .ics file — repeat for each calendar you want to bring across

Finally, bring that calendar into Proton — same idea as contacts. Back on the Import via Easy Switch page, click Yahoo, tick Calendars and select Continue. Proton reminds you it needs an .ics file (the one you just exported) — click Continue again to reach the Import calendar screen.

1. Click Choose a file and pick your .ics file
2. Select Import

The import runs in the background and your Yahoo events land in Proton Calendar. Repeat for each calendar you exported, and your migration is complete.