+
−.PS
+
−# the new architecture
+
−
+
−maxpswid = 6.0
+
−linewid = 0.2
+
−movewid = 0.3
+
−
+
−
+
−I: [
+
−down
+
−I1: ellipse "sendmail"
+
−move 0.2
+
−I2: ellipse "smtpd"
+
−move 0.2
+
−I3: ellipse "..."
+
−]
+
−
+
−move
+
−
+
−QI: ellipse "queue-in"
+
−arrow up right
+
−IQ: box dashed "incoming" "queue"
+
−arrow
+
−SC: ellipse "scanning"
+
−arrow
+
−OQ: box dashed "outgoing" "queue"
+
−arrow down right
+
−QO: ellipse "queue-out"
+
−
+
−move
+
−
+
−O: [
+
−down
+
−O1: ellipse "pipe"
+
−move 0.2
+
−O2: ellipse "smtp"
+
−move 0.2
+
−O3: ellipse "..."
+
−]
+
−
+
−arrow from I.I1.e to QI.w
+
−arrow from I.I2.e to QI.w
+
−arrow from I.I3.e to QI.w
+
−
+
−arrow from QO.e to O.O1.w
+
−arrow from QO.e to O.O2.w
+
−arrow from QO.e to O.O3.w
+
−
+
−
+
−line dotted up from SC.n
+
−box invis "external mail scanners" ht 0.2
+
−
+
−line dotted down from SC.s
+
−PL: box dashed "message" "pool"
+
−line -> down right from QI.e then to PL.w
+
−line <- down left from QO.w then to PL.e
+
−
+
−
+
−.PE