See below for patches, but raq4 comes with POP3/SSL, etc.
sendmail, but I believed there are postfix package available.
raq4 has been discontinued for quite sometime, but the raq550 is until
2007? You can load raq550 software onto a raq4.
raq4r can do raid 1 (mirror) but you can update the raq4 ROM to
120G at 5400rpm, not 7200rpm, seagate drive.
Depends on raq4 model, some comes with one ethernet, some dual.
I believed there are independent samba packages available.
A good mailing list to ask/join is XXXX@XXXXX.COM .
slrn is a command line newsreader.
please reply, to the newsgroup(s).