Tim:
POP3 is really not good for leaving messages on the server.
fedora@eyal.emu.id.au wrote:
I do not leave messages on the server. Let me clarify this.
I usually read messages by downloading and removing them. At times, when I do not have access to my main client, and I need to check my mail, I will ready by downloading and leaving. This is a small number of messages, until I get to my main client.
Well, to be pedantic, you *are* leaving them on the server. Even if it's just for a short while, the problems it can have are the same.
It's one of the advantages of IMAP, you're just synchronising the list of what messages are available. And only downloading the ones you actually read. You wouldn't get that kind of doubling up.
It's worth learning how it works. Set up an additional temporary address somewhere, and try it out without messing up your normal mail.
What would be nice is to have the "Gem Messages" icon go inactive while a download is in progress. It will both indicate that the click took, and avoid a double download.
I presume that's "get" messages. If Thunderbird lets you get the messages twice, overlapping, that sounds like a bug you could report.
I'd expect the GUI to change when clicked, indicating it is downloading your mail, and then reset back to normal at the end of it. I'd also expect that you couldn't click it again in the middle of a mail fetch. That's just asking for trouble.
On other mail clients, when I "get new mail" I get a window pop up with a progress bar, or some progress bar showing on the bottom edge of a main window. If I click the "get new mail" in the middle of it, it doesn't double up.