I along with many other people I know have a Gmail account. I don’t use mine for business, however, I know that some people do.
If you are using your Gmail account for anything that is at all important, you need to check out Gmail Backup. Gmail backup is a nifty utility that allows you to backup your Gmail account. thus preventing you from losing any of your important emails. Google is good, but it is not infallible. Given the email outages that have happened with the Gmail service, it is not inconceivable that you could lose some of your emails at times.
If you use Gmail for anything important at all, I suggest you check out Gmail Backup.
Hat tip to Inter Alia for pointing this out.