I work a lot and my main means of communication over the internet on my laptop.
It will suddenly though decide it is no longer connected.
I am using IMAP now instead of POP3 because I use both my laptop and my desktop.
If I get a message half written on either, I can then finish on the other machine.
The problem is that sometimes it will decide, in the middle of sending a message, that it is no longer connected.
I get a message that sending the mail and/or saving the sent message failed. That is then followed by the compose message window closing after a acknowledge and a message (sometimes a long one) just going away.