1 .PS

2 # stunnel

3

4 L: box wid 2 ht 2

5 box invis "local host" below with .n at L.n

6

7 #P: box wid 0.3 ht 3 with .e at L.w

8

9 P465: box wid 0.3 ht 0.3 with .e at 0.25<L.nw,L.sw> "465"

10 P25: box wid 0.3 ht 0.3 with .e at 0.75<L.nw,L.sw> "25"

11

12 left

13 line <- 1.0 left from P465.w "SMTP over TLS" "(encrypted)"

14 box dashed "remote" "host"

15

16 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"

17

18 right

19 line -> 0.5 right from P25.e "SMTP" "(unencrypted)"

20 box "MTA"

21

22

23 .PE