Foxmail (the beautiful, famous Chinese email-client) runs well from a USB stick, but it writes quite a bunch of entries in the registry (under "Aerofox"). These registry entries seem only to be related to the personalized interface settings of Foxmail (like adjustment of toolbar, colors of text in mails to be used, etc.)
Could Foxmail be made portable, so it writes those entries in an .ini file rather than in the registry? Or maybe it could just be stopped from writing in the registry, keeping it's default settings?
The reason why I prefer Foxmail over all other email clients is that I can SEND with it mails via different accounts, aliases and smtp servers. Almost all other email clients only allow to send mails via *one* preferred account and smtp server.