How to Migrate Greatmail to Office 365 with Emails & Attachments?

admin | Greatmail how to Office 365 | 4 minutes read | Modified on: 08-01-2025

Are you migrating to Office 365 from Greatmail and wondering how to migrate Greatmail to Office 365 with emails and attachments accurately? Then no worries at all because here we will discuss the best techniques to export Greatmail emails & attachments to Microsoft Office 365 and also go through some reasons responsible behind the migration.

Greatmail is a US-based web communications provider that delivers other services as well including email hosting, SMTP hosting, business email solutions and application hosting.

Office 365, on the other hand is a Microsoft online product that is reliable, secure, flexible, and advanced. It is a cloud-based productivity suite that offers applications such as Word, Excel, and Teams for effective teamwork on numerous projects. Even its real-time collaboration features such including co-authoring and document sharing makes it a preferable platform for personal or professional usage.

Why to Migrate Greatmail to Office 365?

Office 365 is trending nowadays due to its benefits features and that somehow became the reasons to migrate Greatmail to Office 365 environment –

  • Easy access of files and application using any device from anywhere with the help of internet connection.
  • Equipped with productivity applications such as Excel, Microsoft Teams, OneDrive, PowerPoint, Outlook, and more.
  • Offers 1 TB of OneDrive cloud storage to backup and access files & photos across devices.
  • Automatically update the features which will save users’ time and cut IT cost.
  • Advanced Security features will safeguard users’ stored database from data loss.
  • Different subscriptions are available with different functionality levels. Any organization or individual can avail desired subscription and use Office 365 services accordingly.

How to Migrate Greatmail to Office 365 Manually?

The section provides the instructions on how to manually perform the migration of Greatmail to Office 365 account. Go through the steps to implement the same –

  1. Make new accounts in Office 365 for users who are migrating from Greatmail.
  2. Assign the M365 licenses to them.
  3. Now, in the admin center, add the domain to which current Greatmail mailboxes are linked.
  4. Set up Greatmail email service on Outlook and access the server information from IMAP Settings.
  5. Generate CSV file containing the list of users’ details (email ID and password) for hosted Greatmail and then specify the credentials in Office 365 admin center.
  6. Go to Exchange admin center to create an endpoint in order to connect Office 365 server with Greatmail IMAP Server.
  7. Create migration batches and initiate the migration.
  8. Change the DNS records to redirect emails to Microsoft 365 mailboxes.
  9.  Again go to Exchange Admin Center and erase migration batches after the Greatmail emails are redirected to Microsoft Office 365.

The process look simple and manageable but it has some limitations that one should consider before executing it.

Limitations of a Manual Process

  • The process is technical and requires knowledge of Greatmail & Office 365.
  • Steps are lengthy and take lot of users’ time and efforts.
  • Need to be implemented carefully and is advised to operate it under experts’ assistance.
  • Non-technical users will face a lot of times while performing it.

So, users who are good with technicalities can handle the manual process. Additionally, the non-technical users can go through the next solution and save their time by exporting Greatmail emails to Microsoft 365 directly.

How to Migrate Greatmail to Office 365 Directly?

The straightforward and simple approach to migrate Greatmail to Office 365 is MacMister IMAP Backup Tool Mac & Windows. Users can add Greatmail credentials with IMAP host and port number and once the account is connected then the tool starts listing Greatmail folders on the application. Afterwards, go to the Select Saving Options and choose Office 365 from the list, then add Office 365 credentials, set necessary filter and migrate Greatmail to Office 365 without any trouble. The software possesses user-friendly interface which eases the process for professional and novice users. And the three step procedure will help users completing the migration task in few seconds.

Moreover, the tool is programmed with numerous features with the help of users can migrate Greatmail to Office 365 according to the requirements. Also, the software freeware version will help users exploring the entire migration process in detail for free.

Working Steps of the Software to Migrate Greatmail to Office 365 on Mac

Step 1. Download and run MacMister Greatmail to Office 365 Email Backup Software Mac on a Mac compatible platform.

Step 2. Add Greatmail credentials with IMAP host and port number and then click Login button.

Step 3. After Greatmail is connected, its folder items start to appear on the left pane.

Step 4. Go to the right-side of the tool, click Select Saving Options, and choose Office 365 from the list.

Step 5. Provide Office 365 login details, set necessary filter (if needed) and click Start Backup button.

Step 6. The Email Backup Report will generate which shows the live migration details of Greatmail to Office 365.

The process will end within few seconds with a notification confirming that the migration is completed successfully. Click OK button and then login Office 365 account to check resultant files. However, you will see that the tool has accurately migrated Greatmail emails to Office 365 account. Furthermore, the layout and metadata properties of all the emails will appear original and precise after the process.

Epilogue

In the write-up, we have provided multiple ways to fix how to migrate Greatmail to Office 365 email account. The manual method is free to use but the steps are lengthy and complicated. Also, it is necessary to have a technical knowledge of Greatmail and Office 365 account before implementing the process manually. On the other hand, direct method is paid but reliable, safe, and easy to use. Any user and organization can utilize the application with ease and migrate Greatmail to Office 365 right away. Moreover, it has a lot of features that help users attaining the desired results in less time. Besides, the free demo version of the application will allow users to experience the software entire process for free. And with the help of the same, users can migrate first 25 Greatmail emails to Office 365 for free.