t-prot -- TOFU protection
   =========================

1. What the hell is TOFU?
   As the man page says:
   TOFU is an abbreviation which mixes German and English words; it expands
   to "text oben, full-quote unten" which means "text above  -  full  quote
   below"  and describes the style of so many users who let their mailer or
   newsreader quote everything of the previous message and  just  add  some
   text  at  the  top;  obviously  they  think that quoted text must not be
   changed at all.  This is quite annoying as it needlessly sends a lot  of
   data  even when it is not required. Some editing of messages is desired.
   Please point these people to the  page  http://learn.to/edit_messages  -
   thank you!

2. What does the script do?
   It detects, and when demanded hides annoying parts in rfc822 messages:
   TOFU,  signatures  (especially  when  they  are  too long),  excessive
   punktuation, blocks of empty lines, trailing spaces and tabs.
   For use inside of MTAs or MDAs it may exit with appropriate libc exit
   codes, so annoying messages may be bounced easily.
   
3. For what can I use it?
   There are  several possibilities.  One is  to filter your email  or news 
   messages when displaying them in your MUA.  Another is blocking annoying
   messages entirely from your system  -  using the script in some sendmail
   or procmail rule, or perhaps even inside innd.

4. Give me some example!  What about  an example configuration  for the MUA 
   mutt(1)?
   An example is included in the distribution.  Please see the man page for
   further details on the activated features.

5. And what about other MUAs?
   I just use mutt, so I do not know how to filter messages in other MUAs.
   If you know how to incorporate t-prot e.g. in Gnus, please just drop me
   a note. ;)

6. And what about an example for bouncing emails?
   Put a line like the following in your /etc/mail/aliases:
   ------SNIPP------
   notofu: |"/usr/local/bin/t-prot -cemtS -p=user@mydomain"
   ------SNIPP------
   (Do not forget to call `newaliases`.)  Messages for notofu@mydomain will
   be scanned for TOFU.  If t-prot found TOFU in a message, it will bounce,
   otherwise it will be  forwarded to user@mydomain.  This works great with
   sendmail,  if you use another MTA you probably have to adapt it.

7. Where did the idea come from?
   Many thanks to Gerhard H. Wrodnigg who uses a TOFU protection script 
   in order to keep the responses to his cancel bot reasonably short.  The
   entire inspiration for this hack came from the "TOFU protection" line of
   his script on many usenet postings.