> The problem I'm having is configuring mastgate... the docs are somewhat
> vague.

Well, the docs explain things that the programs do. Anyway, here is a short
step-by step tutorial to get it working:

1. make sure you have at least PMAIL 3.01
2. create an internet gateway with pconfig. Make sure you set the 
   preprocessed headers to 'glue headers' and set accepts smtp addresses.
   set the output filename format to ~d~d.CNM and the return address
   to something like ~b@host.site (~p)
3. Grant everyone 'C' rights into the directory you specified in pconfig
   as output directory.
4. Try to write a message with internet address and send it. check the
   above mentioned output directory. you should have a CNM file there.
   check the contents and make sure that it's in format similar to
   
   === cut =========================
   $$ <return.address>
   T <destination.address>
   
   RFC header (date:, from: etc...)
   
   message body
   === cut =========================
   
5. read the doc and set up the export section of mastgate.ini file, make
   sure that the account you'll be running the gateway programs on has
   all rights to the output directory.

6. try running EXPORT3. the CNM file(s) from output directory should 
   disappear and you should get 3 files (XQT, CTL and DAT) in your waffle
   spool directory for your mail host. You should be able to send them now
   with UUCICO. Check UUCICO settings in batch file (host name), in
   Waffle's UUCP directory and waffle.ctl file. make sure that you actually
   have a subdirectory named as your UUCP host under spool directory for
   Waffle.
   
7. Check if you got anything in your waffle spool dir (.X and .D files are
   incoming message files). If not, try sending mail to your own internet
   address from pmail and repeat step 6.
   
8. Take a copy of X and D files from your waffle spool so that you can
   restore them if need arises.
   
9. Check import section in mastgate.ini, make sure that the account running
   mastgate has at least C right to novell's mail directory.
   
10.Try running IMPORT3. If X and D files disappear, you're in luck. If 
   not, try setting the STRIPPER option in ini file to opposite value.
   Importing is most critical part of the whole process because some
   unix hosts mangle the filenames in mysterios ways, the reason for
   failure is most often that IMPORT3 is unable to transform the unix file-
   name in X file into the dos filename that UUCICO actually created.
   If you still have problem after trying both YES and NO for stripper,
   contact me again, I have a new (but not quite finished version) which
   has more control over filename transformations.
   
11.You should be up and running now, customize the batch file to your 
   tastes...
   
One common problem seems to be that people forget to set up the SITE
option in export section. In that case your unix host would accept mail 
but will not give you any.