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How to Migrate Gmail to Fastmail Without Losing Emails?

  Rollins Duke
Rollins Duke   
Published: August 18th, 2026 • 6 Min Read

Moving your Gmail mailbox to FastMail can simplify email management and helps you to switch from Gmail to different platforms. However, moving years of emails is not as simple as the user thinks. This guide explains the available migration approach to make it really simple in real life. So, users can easily understand and easily perform Gmail to FastMail Migration.

Gmail labels, attachments, contacts, calendars, and other account data may require separate consideration. Selecting the wrong migration approach can lead to missing emails, confusing labels and folders, incomplete contacts and calendar data or duplicate emails. Simply starting the migration without verifying the result can also leave important data behind.

Method 1: Migrate Gmail to FastMail Using the Built-In Importer

FastMail offers native import features that can connect FastMail to Gmail or Google Workspace and it’s reliable for most individual users. Follow the process to start Gmail to FastMail Migration.

  1. Sign in to your Fastmail account.
  2. Click on FastMail menu and press on Settings.
  3. Click Import and select Gmail/Google Workspace.
  4. Click on Sign in with Google and select your Gmail account.
  5. Grant FastMail the required permissions and choose the data as you want to import.
  6. Select whether FastMail should continue fetching new messages.
  7. Start the migration.

Method 2: Migrate Gmail to FastMail Using IMAP

If users are familiar with IMAP then they can use IMAP feature to directly import Gmail data in FastMail by entering IMAP details and clicking on Start Import.

IMAP Configuration

  • IMAP Server: imap.gmail.com
  • Port: 993
  • Security: SSL/TLS
  • Username: Full Gmail email address.
  • Password: Gmail App Password

Enter the Gmail IMAP details in the supported FastMail migration or mail-import settings, authenticate the Gmail account and select the mailbox data as you want to transfer. Then start the migration and monitor its progress.

Limitations of IMAP Migration

  • Requires manual technical configuration.
  • Large mailboxes may take considerable time
  • Gmail labels can create folder-mapping complexity
  • Authentication may require additional setup
  • IMAP mainly focused on email transfer and not provides advanced control over their mailbox data.

Method 3: Migrate Gmail to FastMail Using an Automated Tool

If you are looking to migrate batch Gmail accounts, specific data or large mailbox data. BitRecover Gmail Backup Tool is a reliable choice as it can perform selective migration and supports OAuth Authentication to make perfect migration without losing any data. Users can easily click on download button and follow the process as we have described below:

  1. Download and run Gmail to FastMail Migration Tool on your system.
    run Gmail to FastMail Migration Tool
  2. Enter Gmail email address and sign in with OAuth.
    Sign in with Google
  3. Select the Gmail mailbox folders as you want to migrate and click Next.
    Select Gmail folder
  4. Choose IMAP from the available saving options.
    Select IMAP
  5. Enter FastMail email address and app password.
    enter FastMail credentials
  6. Enter the FastMail IMAP server details: Server: imap.fastmail.com, Port: 993.
  7. Click on Backup to start transferring Gmail emails to FastMail.
    start migrate Gmail to FastMail

Key Features of Gmail to FastMail Migration Tool

  • It can connect to Gmail securely without manually entering the regular Gmail account password.
  • You can easily choose specific Gmail labels instead of transferring the entire mailbox.
  • This software can easily handle multiple Gmail accounts when moving data for users or organizations.
  • Supports Gmail to FastMail migration for larger mailbox transfers.
  • It preserved all email properties including date, timestamp, recipients, message content, attachments and all other attributes.

How to Forward All Incoming Gmail Emails to FastMail?

If you have migrated all Gmail emails to FastMail but still receive new emails in Gmail, then you can enable forwarding. As it can automatically send future incoming emails to your FastMail email address. This is useful for future emails, but it doesn’t migrate your existing Gmail mailbox.

  1. Sign in to the Gmail account from which you want to forward emails.
  2. Click Settings and select See all settings.
    click on See All Settings
  3. Open the forwarding and POP/IMAP.
    tap on forwarding and POP/IMAP
  4. Under forwarding, click on Add a forwarding address.
    Add a forwarding email address
  5. Enter your FastMail address, click Next, and confirm the request.
    click on confirm pop-up OK
  6. Open FastMail and Click on confirm email.
  7. Click on the Verification link to confirm the forwarding address.
  8. Go to Gmail forwarding settings and refresh the page.
  9. Select Forward a copy of incoming mail to and choose your verified FastMail address.
  10. Click Save Changes.

Frequently Asked Questions About Gmail to FastMail Migration

Is it safe to migrate Gmail to Fastmail?

Gmail to FastMail migration can be performed safely when you use a reliable method and check that all data has been successfully migrated before deleting anything from your Gmail account.

Will my Gmail account be deleted after migration?

No, Migrating Gmail data to FastMail doesn’t automatically delete your Gmail account. You can keep a Gmail account as before confident that the migration is complete and all your data has been properly reflected in FastMail.

Can I migrate Gmail to Fastmail without losing emails?

You can reduce the risk of missing emails by using a trusted tool as we recommended and verify the transferred data has been successfully migrated. Keep a backup and verify all your important data and attachments has been properly appeared and accessible.

What happens to Gmail after I migrate to Fastmail?

Your Gmail mailbox remains retained after migration; you can manually delete emails or complete the mailbox. During the transition, you can continue recording new messages through FastMail fetching or Gmail forwarding feature.

Can I migrate Gmail to Fastmail without stopping Gmail?

Yes, you can continue using Gmail during the migration. FastMail importer or recommended tool works in the background, or you can also use schedule feature to migrate all incoming data on your schedule timing.

Which Approach is best for migrating Gmail to FastMail?

For most individual Gmail accounts, FastMail’s inbuilt importer is the easiest starting point. IMAP is suitable for manual server-based migration, while automated tool may be better for selective, multiple-accounts or bulk mailbox transfer.

How do I know if my Gmail migration to Fastmail was successful?

Review the migration report for failed, skipped or unnecessary items. Compare important folders and labels, open old and recent emails and test attachments. Verify timestamps and all data have accurate attributes.

Final Thoughts

In this guide, we have covered three approaches to migrate Gmail to FastMail. Additionally, we have also shared a forwarding approach for future messages. Each approach has its own benefits, challenges and technical requirements. For selective. Large or multiple account email transfer, Automated Tool offers greater control than manual IMAP migration.


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