Re: Mozilla SeaMonkey/thunderbird
I ran Seamonkey before. The downside is resource intensive. I was able to run Seamonkey on 120MB minimum! Three tabs.
Thunderbird is a mail client. Nothing is stored, except if you use Gmail. It will download a copy, but if you want to delete the e-mail, you need to go to Gmail and then delete it. Then, go to Thunderbird to delete it.