If you are using Microsoft Outlook it is not a difficult thing but there are quite a few buttons to push.
If you are using yahoo, gmail, lycos, or whatever find out if you can POP your mail to Microsoft Outlook. You probably can.
I load all my mail by the month and year on a SSD that I keep in my possession.
It works like this:
you ask your program how to store a data file.
You select your mailbox and its sub folders.
You export it to a data file (hint, it is easier if you use the month and year to name the file and the mailbox you will later open, just avoids confusion)
I do not use a password because that can cause problems too.
You will be asked to choose a file type.
I use .pst because it saves my attached documents and all.
I select the do not export duplicate files button to speed it up.
Once the month is up I save the last of the emails on the SSD and then delete the email from my inbox/sent mail folders.
When I need them I follow the instructions to access the data files.
I always have to look this up because I can never remember but it is something like file tab, data files, import, and direct to the appropriate file.
Once stored the email can be accessed by any computer with Microsoft Outlook.
I have every email from work for the last 10 years. I work in a high accountability environment.
Any discrepancies can be cleared up in seconds.
Yeah, I am your nightmare supervisor 🙁 but I have the data :))
Oh yes, when you pull that SSD out of the USB port no one can access your mail, even if you leave your computer logged on and Microsoft Outlook open. So it is as secure as you remembering to take it with you.
If you use gmail YES. You do it on the settings of gmail. It will send you one big file containing everything.
Otherwise just connect using outlook or opera, then set it to download emails from all time and then you can export them to your machine.
"MailStore" can backup all emails in a central archive, even if they are distributed across different computers, programs or mailboxes. You can do this either on your PC or on a USB drive as a "portable" option.
Free version: http://www.mailstore.com/en/mailstore-ho…
Commercial/high volume premium versions available: http://www.mailstore.com
For Windows XP SP3, Vista, 7 and 8
U can make folder on your email and move them there. That's probably the simplest way
This is what Outlook Express, Thunderbird and the rest all do.