Add ProtonMail to Outlook

ProtonMail encrypts mail on Proton's side, so Outlook cannot read it with a plain email address and password. Wrong settings or your regular Proton password block every login, and free accounts have no Bridge at all. Below are two ways to add ProtonMail to Outlook, with Proton's own steps, limits and fixes for missing mail.

Can Outlook connect to ProtonMail directly?

No. Proton does not offer POP3, and its IMAP and SMTP access goes through Proton Mail Bridge. Bridge is a desktop app that creates a local mail server on your computer, encrypts outgoing messages and decrypts incoming ones. Proton's pages state that Bridge is available only with a paid Proton Mail plan, so free accounts cannot use it. Proton names Outlook, Apple Mail and Thunderbird as supported clients. Read Proton's pages on Proton Mail Bridge and IMAP, SMTP and POP3 setup for plan details.

That split decides how you add ProtonMail emails to Outlook. Paid users add ProtonMail to Outlook through Bridge. Free users export mail first, then load files into Outlook.

How to add ProtonMail to Outlook with Proton Mail Bridge?

To add ProtonMail to Outlook with Bridge, install Bridge, add your Proton account and enter its server details in Outlook as IMAP. Proton's Outlook guide lists steps for Outlook 2019, and newer versions follow a similar flow.

1. Install Proton Mail Bridge on your computer and sign in with your Proton account.
2. Open Bridge and copy its IMAP and SMTP server details and your Bridge password.
3. In Outlook, go to File, then Add Account.
4. Enter your ProtonMail address, open Advanced options and choose manual setup.
5. Select IMAP and enter server and login details from Bridge.
6. Enter your Bridge password when Outlook asks for one. Proton says your regular Proton password does not work.
7. Accept Outlook's security warning for Bridge's certificate. Install that certificate to stop repeat prompts.

Bridge must stay installed so your ProtonMail to Outlook connection keeps working. Proton's page, Proton Mail Bridge with Outlook 2019, also covers split addresses mode and certificate install. To save your own copy of IMAP mail, read how to download IMAP emails from a server.

How to export ProtonMail emails to Outlook with Export Tool?

To add ProtonMail emails to Outlook on a free plan, use Proton's Export Tool, then import ProtonMail emails to Outlook from your files. It is a command-line utility that saves decrypted mail on your computer, and Proton says it is available for everyone. It saves every message as an EML file with a JSON file for metadata. Proton's page lists Windows 10, macOS 10.15 or 11.0, and Ubuntu 20.04 as minimum systems.

1. Download Proton's Export Tool, extract it and launch it.
2. Sign in with your Proton username and password. Enter two-factor or mailbox passwords if asked.
3. Choose backup and select a folder for your files.
4. Wait until a progress bar reports completion.
5. Open your folder and confirm it holds EML and JSON files.

Exports cannot be paused and resumed, and large mailboxes can take hours, so keep a stable connection. Proton's page, Proton Mail Export Tool, lists these limits. Its current page does not mention MBOX. Export Tool handles mail only, not Calendar, Drive or Pass data.

Outlook opens one EML file at a time and has no folder import for them, so drag and drop works for a few messages only. Ignore JSON files, because they hold metadata, not mail. For folders of mail, use software below.

Steps to move ProtonMail emails to Outlook with software

1. Export your ProtonMail mail with Proton's Export Tool first, so you hold a folder of EML files.
2. Install Corbett EML to PST Converter on your Windows PC with administrator rights.
3. Go to Open, then Email Data Files, then Upload EML File. Select single files or your full export folder.
4. Wait while software scans your files, then preview messages in its panel.
5. Tick folders to include and leave others out of your PST.
6. Select Export and choose PST.
7. Add date or sender filters if you want fewer emails, then select Save.

Open your PST in Outlook from File, Open & Export and Open Outlook Data File, then compare folder counts. Test your ProtonMail to Outlook move in free demo before you buy. Add ProtonMail to Outlook in small batches first. Lifetime licence starts at $99 with a 30-day money-back window. Paid Proton users can also move ProtonMail emails to Outlook with Corbett IMAP Migration Tool through Bridge, which then lists folders from your local Bridge server. For another EML workflow, see how to import EML to Windows 10 Mail.

Which way to add ProtonMail to Outlook is best?

Use Bridge to add ProtonMail to Outlook if you pay for Proton and want live mail in Outlook. Use Export Tool plus software to move ProtonMail emails to Outlook when you have a free account or want a PST copy. Drag and drop suits only a handful of messages.

Why does ProtonMail login fail in Outlook?

ProtonMail to Outlook login fails when Outlook receives your regular Proton password. Bridge creates a separate password that stays on your computer, and Proton's guide says your regular Proton Mail details do not work in Outlook. Copy that Bridge password from Bridge and paste it into Outlook. A certificate prompt appears when Outlook first meets Bridge, so accept it and install that certificate.

If Outlook still cannot connect, confirm Bridge is open and your account shows as signed in. In split addresses mode, every Outlook account sends and receives for one address, and Proton advises waiting until one address finishes downloading before you add another. To fix a PST that Outlook rejects, read how to fix a PST that is not an Outlook data file.

Why are ProtonMail emails missing in Outlook?

Missing mail comes from four causes after you transfer ProtonMail emails to Outlook. Bridge needs time to download folders, so a new account looks empty at first. An export that stopped midway leaves files out, since Export Tool cannot resume. JSON files hold metadata, so importing only JSON gives no mail. Unticked folders and active filters leave mail behind in any tool.

Check download status first, then export logs, then folder ticks when your ProtonMail to Outlook move looks incomplete. Compare message counts in Proton webmail and Outlook. To move mail to Gmail from a similar provider, see how to move Yandex mail to Gmail.

Questions about ProtonMail to Outlook