386 PC as mail server?

[Mike Van Pelt]

I'm planning to set up a 386 PC as a mail and news server on a network
of Suns.  My current plan is to remote mount the spool files onto the
Sun, so I need a Unix that understands NFS.  I also want to have all
mail (including local mail) sent to the PC for delivery, so I need the
PC to run sendmail.  This is the way it's working now, with a Sun
as the mail server.

My main concerns are:

1) Is there an NFS that works on Unix-running PC's?  Is there a problem
   going between the SysV Unix on PC's and the Berkeley Unix on the Sun,
   or does NFS handle this in some reasonable fashion?
   (It should; PC-NFS interfaces MS-DOS and Unix.)

2) What about the availability of sendmail for SysV?  Can Berkeley-style
   sockets connect to it?

3) Do any of the PC Unix vendors supply NFS and/or sendmail, or do these
   need to be obtained separately?

4) Has anyone else done this?  If so, are there any awful pitfalls I need
   to know about?  Any vendors to steer clear of?
 
Please send Email, and I'll summarize.
-- 
Mike Van Pelt                      "Nobody's life, liberty, or property
Headland Technology/Video 7         are safe while Congress is in session."
...ames!vsi1!v7fs1!mvp                        -- Will Rogers