.PS
# proxy-setup

linewid = 0.5
lineht = 0.3

externlen = 0.8

L: box wid 4.2 ht 1.3
box invis


P25: box wid 0.3 ht 0.3 with .e at 0.40<L.nw,L.sw> "25"
left
line <- externlen from P25.w "SMTP" "from remote "

right
line -> right from P25.e "SMTP" ""
box "proxy"
arrow "SMTP" ""

Pi: box wid 0.3 ht 0.3 "X"
arrow "SMTP" ""

M2: box "masqmail"
arrow linewid*1.8 from 0.20<M2.ne,M2.se> "SMTP" ""
box wid 0.3 ht 0.3 ""
line -> externlen "SMTP" "to remote"
arrow linewid*2/3 from 0.50<M2.ne,M2.se>
box "pipe" ht 0.16 wid 0.4
arrow right from 0.80<M2.ne,M2.se> then down 0.2
"" "mailbox"

line <- down left from 0.75<M2.nw,M2.sw> "" "" "   stdin"
box invis ht 0.3 "" "sendmail" "command"


#box dashed "remote" "host"

#spline -> from P465.e right 0.4 then to 0.5<P465.s, P25.n> then to P25.w-(0.4,0) then to P25.w "stunnel"

#right
#line -> 0.5 right from P25.e "SMTP" "(unencrypted)"
#box "MTA"


.PE