Before downloading, ensure your system meets the minimum requirements for the 2.9 branch:
Since you want to stick with version 2.9, you must disable updates: download mailbird 2.9
Q: Can I legally download Mailbird 2.9 for free?
A: The software is copyrighted, but abandonware sites host it. If you don’t have a license key, you get a 30-day trial. Using beyond that without payment violates the EULA. Before downloading, ensure your system meets the minimum
Q: Will Mailbird 2.9 work with Office 365 / Exchange?
A: Only if your Exchange server supports basic authentication. Most modern Office 365 tenants have disabled it. Q: Can I legally download Mailbird 2
Q: How do I backup my Mailbird 2.9 settings?
A: Copy the folder %localappdata%\Mailbird\Data to an external drive.
Q: Can I import PST files from Outlook?
A: No. Mailbird does not natively support PST. You’d need to convert PST to EML or MBOX using third-party tools.