How to backup emails in mail clients
The necessity of having a backup of your account emails is a common one because of various reasons - to make sure important emails can be re-instated in case of accidental data loss, when preparing for migration, etc.
The guidelines below will explain how to backup the emails using mail clients - Outlook, Thunderbird and MacMail.
To backup emails with Outlook, go to File > Open & Export > Import/Export:
In the next window select Export to a file and choose the extension you would like to backup the emails in - .csvor .pst.
You should choose the format depending on your needs.
If you need to backup emails to keep reserve copies - any will do.
If you plan on migrating the emails somewhere else later, it is recommended to check the supported format with the other mail provider:
In the next window select the folder you would like to backup, target location and backup name:
Click on Finish to complete the process:
To backup emails in Thunderbird you can simply select the emails you would like to backup, right click on them to call a context menu > Save As...
By default your emails will be saved in .eml file type, it is one of the most common types for email migration.
You can also choose .txt or .html type depending on your needs:
To export the emails in MacMail right click on the folder in question to call a context menu > Export Mailbox...
This will backup your mail folder as .mbox package: