Hmmm, I've been using "Prayer" webmail app for several years, it was/is developed at Cambridge. There appears to be ongoing development of this app, the last update available from the FTP site is dated 9/4/2006.
http://www-uxsup.csx.cam.ac.uk/~dpc22/prayer/ ftp://ftp.csx.cam.ac.uk/pub/software/email/prayer/ diana
