Migrate Fastmail to Google Workspace: Admin Guide for IT Teams
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Written By
Aradhya Jain -
Approved By
Shivam Rathore -
Updated on
June 23rd, 2026 - Read Time
8 minutes
User Query: After using Fastmail for several years, our team started running into collaboration limitations. We relied heavily on Google Docs and Meet for client work, so managing email separately became inefficient. As the company admin, I needed a reliable way to migrate Fastmail to Google Workspace without losing historical emails, folders, or contacts.
Introduction: Fastmail is known for its privacy-focused email services and clean interface. However, several users eventually move to Google Workspace to take advantage of collaborative tools, advanced security controls, and a larger ecosystem of business applications. The migration process may seem straightforward at first, but transferring thousands of emails, custom folders, contacts, calendars, and historical data requires proper planning. This guide explains how to migrate Fastmail to Google Workspace using both manual and a professional DRS Softech IMAP Backup Tool. Each method offers a quick, reliable, and hassle-free migration.
Before Migrating from Fastmail to Google Workspace
- Fastmail uses IMAP migration.
- Google’s Data Migration Service supports IMAP servers.
- Labels and folders behave differently in Gmail.
- Contacts and calendars may require separate migration.
- MX records should not be changed until validation is complete.
Fastmail to Google Workspace Migration Prerequisites
Before migrating Fastmail to Google Workspace, make sure everything is properly configured to avoid interruptions or data loss.
- Verify your domain in Google Workspace so you can create and use email accounts with your existing domain.
- Add all user mailboxes in Google Workspace before starting the migration.
- Google’s migration service uses IMAP to access Fastmail data, so IMAP must be enabled.
- If two-factor authentication is enabled in Fastmail, create an app-specific password for migration.
- Check the size of Fastmail mailboxes to estimate migration time and storage requirements.
How Folder Structure is Handled During Migration
One of the most common concerns among administrators is preserving mailbox organization. During Fastmail to Google Workspace migration:
- Inbox, Sent Items, Drafts, and custom folders are generally migrated successfully.
- Fastmail folders are converted into Gmail labels.
- Email attachments remain associated with their messages.
- Read and unread email status is typically preserved.
Best Method to Migrate Fastmail to Google Workspace
For large-scale or business-critical migrations, using a professional migration solution can simplify the entire process. The DRS Softech IMAP Email Backup Tool enables users to migrate emails directly from Fastmail to Google Workspace without lengthy manual configurations.
The software connects to Fastmail through IMAP and transfers mailbox data to Google Workspace while maintaining email properties and folder structure. It is suitable for both individual users and organizations managing multiple mailboxes. You can also migrate IMAP to Office 365, Gmail, Yahoo Mail, etc.
Simple Steps to Transfer Fastmail Emails to Google Workspace
- Download and install the DRS Softech IMAP Email Backup Tool.
- Enter your Fastmail email credentials, including ID and password, to Sign In.
- Preview and select the IMAP emails to transfer. Click Next.
- Choose Google Workspace (G Suite) as the Saving Format from the given list.
- Enter your details to authenticate your Google Workspace account.
- Lastly, apply advanced features and filters as needed. Press Start Export.
Manual Method to Migrate Fastmail to Google Workspace
Google Workspace includes a built-in Data Migration Service that allows administrators to transfer emails from Fastmail using IMAP. This method is suitable for small to medium-sized migrations where only email data needs to be transferred.
1st Step: Sign in to Google Admin Console
- Open the Google Admin Console.
- Sign in using your Google Workspace administrator account.
- Make sure the destination user accounts have already been created.
2nd Step: Open the Data Migration Service
- In the Admin Console, go to Data Migration.
- Click Set Up Data Migration if you’re using it for the first time.
3rd Step: Choose the Migration Source
- Select Email as the migration type.
- Choose Other IMAP Server as the migration source.
- Click Continue.
4th Step: Enter Fastmail IMAP Settings
- Configure the Fastmail server details:
- Fastmail IMAP Configuration
- IMAP Server: imap.fastmail.com
- Port: 993
- Connection Security: SSL
- Authentication: Username and Password
- Click Continue after entering the details.
5th Step: Generate an App Password (If Required)
If Fastmail account security includes two-factor authentication, create an app-specific password:
- Sign in to Fastmail. Open Settings → Privacy & Security.
- Select App Passwords or App-Specific Passwords.
- Generate a new password for the migration process.
- Use this password instead of the regular Fastmail password in Google’s migration tool.
6th Step: Add User Credentials & Save the Mapping
- Enter the Fastmail email address.
- Enter the password or app password.
- Select the corresponding Google Workspace destination account.
- For multiple users, repeat the process for each mailbox or upload mappings if supported by your Google Workspace plan.
7th Step: Configure & Start the Migration
- Choose the data you want to migrate: Emails, Attachments, Folder structure (converted to Gmail labels), and Read and unread status.
- You can also specify a date range if you only want to migrate recent emails.
- Review all settings. Click Start Migration.
Limitations of the Manual Method
- Contacts usually require a separate export/import.
- Calendars require a separate migration.
- Limited reporting and monitoring.
- Large mailbox migrations can be slow.
- Less suitable for bulk enterprise migrations.
Comparison: Manual Method vs Professional Tool
|
Manual Method |
Professional Tool |
|
Requires multiple configuration steps and technical knowledge. |
Simple and user-friendly migration process. |
|
Suitable for small mailbox migrations. |
Ideal for both small and large-scale migrations. |
|
Contacts and calendars often require separate migration. |
Provides a more streamlined migration workflow. |
|
Limited monitoring and reporting capabilities. |
Offers better migration control and progress tracking. |
|
Bulk mailbox migration can be time-consuming. |
Supports migrating multiple mailboxes efficiently. |
|
Higher chances of manual errors during migration. |
Reduces migration risks and administrative effort. |
Expert Recommendation to Move FastMail Email to Google Workspace
For organizations migrating multiple mailboxes or large volumes of email data, a professional migration tool is often the most efficient option. It helps reduce manual effort, minimizes migration risks, and ensures a smoother transition to Google Workspace.
Case Study: A marketing agency with 45 Fastmail users needed to migrate over 800 GB of email data to Google Workspace. Using an automated migration solution, the team completed the migration over a weekend while preserving folders, attachments, and email metadata, with minimal disruption to daily operations.
Conclusion
In this technical blog post, we explored several methods to migrate Fastmail to Google Workspace. The manual method is only suitable for migrating a small number of Fastmail emails. However, it has several limitations. Therefore, it’s best to use the professional tool. It supports batch migration with multiple advanced features. You can download the demo version of this tool to test its features and functions.
Frequently Asked Questions
Ans. You can migrate Fastmail to Google Workspace using Google’s Data Migration Service by connecting your Fastmail account through IMAP. Alternatively, you can use the DRS Softech IMAP Email Backup Tool for a faster and more automated migration process.
Ans. Yes. If the migration is performed correctly, emails, attachments, folder structure, and other mailbox properties can be transferred without data loss. Creating a backup before migration is always recommended.
Ans. Yes. Fastmail supports IMAP, and Google Workspace’s Data Migration Service can connect to Fastmail mailboxes using IMAP credentials to migrate email data.
Ans. Yes. DRS Softech migration tool preserves email metadata, including sender and recipient details, subject lines, timestamps, attachments, and read/unread status.
Ans. Yes. During migration, Fastmail folders are generally mapped to Gmail labels, helping maintain the original mailbox structure.
Ans. Yes. Reputable migration solutions, like DRS Softech, use secure authentication methods and encrypted connections to protect data during the migration process.
Ans. No. The DRS Softech IMAP Email Backup Tool uses credentials only for authentication and migration purposes and does not permanently store login information.
Ans. Yes, a professional migration tool supports bulk mailbox migration, making it suitable for organizations managing hundreds of user accounts.
Ans. Yes. In most cases, users can continue using their Fastmail accounts while migration is running. However, administrators should carefully plan the final MX record switch to ensure no new emails are missed.
