Does running modest with debug/log options (see https://wiki.maemo.org/Bugs:Stock_an...he_mail_server) indicate anything useful?
process 1517: D-Bus library appears to be incorrectly set up; failed to read machine uuid: Failed to open "/var/lib/dbus/machine-id": No such file or directory See the manual page for dbus-uuidgen to correct this issue. D-Bus not built with -rdynamic so unable to print a backtrace maemo-summoner: summoning '/usr/bin/modest.launch' Aborted