Best Ways to Migrate Fastmail to Proton Mail
If you want to migrate Fastmail to Proton Mail, probably a less private email provider, then you are not alone! The vast majority of users want to make this switch because they want stronger encryption for their email, as well as more control over their data.
The reason you would want to move from Fastmail to Proton Mail is because Proton Mail provides more security for your emails than Fastmail. Proton Mail is the first email provider that has adopted a privacy-first approach to email.
Transferring emails from Fastmail to Proton Mail is not the same as simply moving them to another email provider. Proton Mail is built on a different email architecture than other email providers, and as a result, many users have trouble finding ways to manually migrate Fastmail to Proton Mail.
In this guide, we will discuss when a user migrate emails from Fastmail to Proton Mail, why using a Fastmail to Proton Mail transfer tool is the best option, and what the manual methods of transferring their email are and the limitations of those methods.
Common Scenarios to Import Fastmail to Proton Mail
- Moving to a Privacy-Focused Email Platform
For many users, the primary reason for switching from Fastmail to Proton Mail is to get their sensitive communications protected. Users want to migrate their Fastmail emails to Proton Mail can preserve their data and attachments in the process. - Business or Professional Data Security Needs
Users handling business or professional confidential data typically require the use of Proton Mail. Therefore, they must migrate Fastmail to Proton Mail in an accurate and secure manner. - Leaving Fastmail but Keeping Old Emails
Some users discontinue Fastmail accounts but would like access to their old email data. Therefore, when users transfer Fastmail to Proton Mail, they will have access to important conversations for a long time. - Managing Large or Long-Term Email Data
Users with email data that has been built up over many years often find that transferring files in bulk to Proton Mail manually is unreliable. In such instances, a structured process for migrating Fastmail emails to Proton Mail needs to be set up and followed.
Important Things to Check Before You Migrate Fastmail to Proton Mail
It is important to understand the following before migrating from Fastmail to Proton Mail:
- Fastmail size of all your email folders
- The number of folders and subfolders you have in Fastmail
- The importance of attachments and metadata
- Proton Mail’s limits on imports
- The amount of time it will take to migrate
If you are concerned about accuracy and privacy, the most secure method to migrate from Fastmail to Proton Mail is to use the Fastmail to Proton Mail migration tool.
What is the Best Way to Migrate Fastmail Emails to Proton Mail?
The best way to migrate Fastmail to Proton Mail is by using a dedicated Fastmail to Proton Mail migration tool. The best tool to migrate emails from Fastmail to Proton Mail is Email Backup Software. The solution is specifically designed to make migration processes like Fastmail to Proton Mail much easier, secure and faster.

Why Use a Fastmail to Proton Mail Migration Tool (Recommended)
Proton Mail and the service provided by Fastmail do not use the same type of technology, so it is difficult to migrate from one service to the other through normal channels. Therefore, it is important to use the Fastmail to Proton Mail migration tool.
The dedicated Fastmail to Proton Mail migration tool allows users to safely migrate Fastmail to Proton Mail without losing any data in the process.
Using a Fastmail to Proton Mail migration tool has many benefits:
- Accurately migrate emails from Fastmail to Proton Mail,
- Maintain your current folder and email structure with metadata.
- Migrating multiple Fastmail email accounts all at once.
- Decrease the number of email duplications or emails that you have not received.
- Save significant amounts of time and energy from manually transferring emails.
- The professional Fastmail to Proton Mail migration tool is ideal for customers who care about maintaining their privacy and the accuracy of how their emails are transferred, as well as the completeness of the email transfer process.
When a Fastmail to Proton Mail Migrator Is the Best Choice
The Fastmail to Proton Mail migration tool is highly recommended if:
- You have a lot of Fastmail emails in your mailbox
- Your email includes private or sensitive information
- You wish to maintain complete accuracy of your folders and attachments
- Manual methods are slow and can be unsuccessful.
- You are migrating business or professional related emails.
In these cases, using a Fastmail to Proton Mail migrator will give you peace of mind, knowing that the transition will be reliable and will protect your more sensitive data.
Transfer Fastmail to Proton Mail Using Built-In Easy Switch
Proton Mail provides a built-in option called Easy Switch that can help to migrate Fastmail to Proton Mail:
- Log in to your Proton Mail account
- Go to Settings > All settings > Account > Import via Easy Switch
- Click Start new import and choose Fastmail (or Other email provider)
- Sign in to your Fastmail account when asked
- Review the options and start the transfer
- Proton Mail will import your emails, folders (as labels), and contacts in the background.
Why Manual Migration Is Often Not Reliable
The manual methods require technical knowledge, accessibility of Fastmail and Proton Mail accounts and consumes a lot of time. Therefore, even a single error can be risky.
As such, many professionals prefer a Fastmail to Proton Mail Migration Tool simply because it streamlines the entire process and reduces the risk of technical issues.
Final Thoughts
Choosing to migrate Fastmail to Proton Mail is a wise choice for any user concerned with the protection of their personal information and data, however, planning is key to making this transition smoothly.
The manual method for transferring small amounts of data has been proven effective for many users, however, there are other tools available that offer a more efficient solution when handling larger or more sensitive email mailbox accounts.
By choosing the best solution for your needs, you will have confidence that you are moving your email from Fastmail to Proton Mail without any risk.