Those who often travel or own their business use mail forwarding service because they don't have to worry about where their letter is, and if it gets to the next destination or if they have to shut it up and wait until it arrives.
Digital mailbox service is very helpful nowadays. What happens is that the mail is scanned by the company that receives it, and then they put it in your private online account so you can check-in and see it from anywhere you have Internet access.
This is actually not a high-tech idea, but the truth is they use high-tech machines to scan envelopes so that each digit can be read by the user. You will never wonder where your letter is, or worse, delay traveling to wait for envelopes or packages.
The mail scanning service receives your mail, scans it into the computer, and gives you an account where you can log in and see what you have received that day.
The scanner used today is very high-tech and gives you a complete and clear picture of the content, including any images or small print that might be on paper. The best thing about reading it in pictures is that you can make it as big as you want.