sendmail config

[Tony Berth]

Dear group,

I'm running a 386 5.2 OpenBSD box with sendmail and would like to strip
following headers from the outgoing e-mails:

*Received:* from x.x.x.x
     (SquirrelMail authenticated user <user>)
     by new.host.name with HTTP;
     Thu, 11 Apr 2013 14:31:59 +0300
[from the above I would like to strip the IP address of the webclient, the
MUA as well as the logged-in user]

*References:* <e253a79261e44ce227bbc166a9adaf84.squir...@new.host.name>
     <a369eabe7962808743d2de3a4134d0c9.squir...@new.host.name>
     <32410656f1b0057d8966ea544f68f1dd.squir...@new.host.name>
     <db43aa23cdc95bb7218fa33c8aa18efa.squir...@new.host.name>
[from the above I would like to strip the history of the refes]

*User-Agent:* SquirrelMail/1.4.22
[from the above I would like to remove the MUA]

Thanks

Tony