Also, there is this part of the text:

No matter what email client you're using, why not take a look at your mail files now, and save or export some older messages if your mailboxes are getting unwieldy? Email problems like this are always easier to prevent than to recover from!

I will never understand why people keep all those hundreds and hundreds of messages in their inbox. If some message is very important to you, why not save it as e-mail somewhere on your hard drive, and that way, you’ll aslo have backup. Exporting of PST is always welcome, but some people still think that inbox is bottomless hole… like always, we should be more careful about everything, not just think that computers will do everything for us…