Looking to backup your email , whether you are on Outlook , Gmail etc then use Mail Store Home
I came across this recently when I had to migrate email from Thunderbird to Outlook
Mail Store Home will backup the following
- Internet mailboxes such as Gmail or Yahoo! Mail
- Any POP3 and IMAP mailboxes
- Microsoft Outlook 2000, XP, 2003, 2007, 2010
- Microsoft Outlook Express and Windows Mail
- Microsoft Exchange Server 2003, 2007, and 2010 mailboxes
- Microsoft Office 365 (Exchange Online)
- Hosted Exchange mailboxes
- Mozilla Thunderbird and SeaMonkey
- .EML and other email files
creates a single archive for all your emails
also provides an integrated search feature , allowing you to search by email and or attachment
Mail Store Home is also free and is for Windows XP – Windows 7.