I have several computers in my home, and a I have currently Thunderbird installed on all the computers, so that the mails are stored on a NAS (network attached storage) device. That has worked mostly well, but especially from computers using a wireless connection, I have received many times an "delayed write error" when having Thunderbird open. This has resulted in several problems, as having my profile locked out, mails disappearing (all recoverable with some work) etc.
Is there some mail client around, which can cope well with having the mail stored on a network drive? Preferrably for Windows and something reasonably modern, being able to display images.