maybe not truly freebsd related

[Robert Bonomi]

> From owner-freebsd-questions at freebsd.org  Tue May  8 09:31:02 2012
> Date: Tue, 8 May 2012 16:28:08 +0200 (CEST)
> From: Wojciech Puchar <wojtek at wojtek.tensor.gdynia.pl>
> To: freebsd-questions at freebsd.org
> Subject: maybe not truly freebsd related
>
> by possibly someone can help.
>
> I want to use FreeBSD as timeshared server with some amount of X terminal 
> (basically for free with old computers, netboot, running just Xorg -query 
> and xdm on server).
>
> But yet - what graphical mail program can you recommend that have such 
> simple basic functionality of local mail support in Maildir format?

Did you try googling for 'X mail client FreeBSD'?   A mere 14+ million hits.
add 'maildir' to the search, and you get over 1.6 million .  Eliminate
referenes to Apple, and there are still over 1.2 million hits.

*LOTS* of options for you to investigate.