With the help of SysConverter for MBOX you import MBOX to FastMail in a few simple clicks. The tool can effortlessly import emails from multiple MBOX files into FastMail account without any hassle.
Steps to Migrate MBOX to FastMail
1. Run the SysConverter for MBOX Tool.
2. Add the MBOZ files.
3. Click on Export >> IMAP.
4. Enter your FastMail login details and hit the Save button.
Done! Here complete the MBOX to Office 365 migration process.