> This was probably due to internet being on dial-up and being billed by the minutes was common so users limited their internet time (e.g. disconnect from inter

> This was probably due to internet being on dial-up and being billed by the minutes was common so users limited their internet time (e.g. disconnect from internet if writing a long email response, etc.). You can remove the "probably", it was exactly for that. Most often then not you would write offline, send the email (which would go in the "outbox") and then later on you would eventually connect to the Internet and send/receive emails.