-
Written By
Suman Rawat -
Approved By
Sonika Rawat -
Updated on
September 26th, 2025 -
Read Time
6 minutes
As companies expand, email systems expand as well. Mailbird is an excellent email client for individuals and smaller businesses. But as companies become larger enterprises, they shift to Office 365 (formerly Microsoft Office 365) mostly for cloud hosting, compliance, and collaborative benefits. The biggest hurdle is to migrate Mailbird to Office 365 in a seamless manner, especially with years of data. This blog discusses the best possible manual methods and an automated IMAP Backup Tool to keep your data effective and highly secure.
Mailbird: A desktop-based Windows email client that supports many email accounts and integrates with apps like Google Calendar and WhatsApp. Mailbird stores emails in local database files.
Office 365: A cloud-based suite that includes Outlook, OneDrive, Teams, and other applications. It even offers Exchange Online for email, which provides high security and makes it a preferred email hosting choice for many organizations.
Considering this basic distinction between the two clients, other factors that make the migration a crucial aspect are:
User Query:
“I have been responsible for using Mailbird for many years now, but I discovered that my company is now changing to O365 as our email resource. I need to copy all emails from Mailbird to my Office 365 account, with all attachments too. Also, I need to keep the folder structures from my Mailbird email client. Is there a way for me to do this directly?”
With various solutions available, we have jotted down the relevant free solution and a professional tool that makes the process simpler, smoother, and quicker. These are briefly discussed over down here and you can refer to these for the migration as per your preferences.
Follow this step-by-step guide to understand how you can conveniently transfer the data via IMAP:
Incoming Details
Server: outlook.office365.com IMAP Port: 143/993 (with SSL) Encryption: SSL/TLS |
Outgoing Details
Server: smtp.office365.com Port: 25, 587, or 26 (or 465 with SSL) Encryption: SSL/TLS |
This is how you complete the process to transfer emails from Mailbird to Microsoft 365 for free. Though this method is useful, you may face troubles without technical expertise. Also, you need stable connectivity and a lot of time to execute the solution. Moreover, there are chances of missing emails or data loss even with so much of manual effort.
So what can you do for a worry-free and hassle-free solution? Try the another solution as stated down here.
SysInfo IMAP Backup Tool is the most efficient approach for bulky datasets from Mailbird mailbox. It is a fast and trusted solution to ensure all your data transfer securely in a single go with 100% accuracy. Plus, using it you can save emails in several formats on your local system, or transfer to other clients than Office 365. Moreover, it is designed to skip similar emails, remove attachments, and perform selective migration, as required. Adding to it, any user can follow its simple and easy interface to perform the migration. To see how, refer as follows:
Steps to Migrate Emails from Mailbird to Office 365
Client Testimonials:
“We migrated 15,000+ Mailbird emails to M365 without even one formatting error. The professional tool retained our folder hierarchy and attachments exactly as they were originally, saving us weeks of work!”
– Rachel Evans, BeeTech Operations Manager, USA
“We needed to immediately transfer Mailbird emails to Microsoft 365 for our remote team. The process was streamlined with the IMAP Migrator. Every email, folder, and attachment synced perfectly for large data volumes at once. What could have taken a lot of time manually was done instantly, allowing us to switch without disruption.”
– Daniel Wright, IT Admin, New York
Migrating Mailbird to Office 365 account can seem overwhelming in the start with the different formats and locations. But when you use the correct method, it’s very straightforward. IMAP migration works fine for smaller data sets with technical skills. But professionals managing batch emails or who are more concerned about data security and disruption need to use the Mailbird to Office 365 Migration Tool for speed, safety, and accuracy.
Ans- No. Mailbird does not currently support Office 365 export directly from the program. It can be done with some other email programs using IMAP sync or a IMAP Backup Software.
Ans- Yes. Provided that you use the IMAP Email Backup Tool, all of your attachments and email properties will remain in place. And with the Remove Duplicate feature, you can skip similar data on the basis of To, From, Subject, and CC.
Ans- Yes. This IMAP Backup Software works in all system environments. As needed, you can use it on any version of Mac, as well as Windows and Linux.
About The Author:
Suman Rawat is a technical content writer and expert in the fields of email migration, data recovery, and email backup. Her passion for helping people has led her to resolve many user queries related to data conversion and cloud backup.
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