#FIG 3.1 Portrait Center Metric 1200 2 2 2 0 2 -1 7 0 0 -1 0.000 0 0 0 0 0 5 1800 2025 4950 2025 4950 2700 1800 2700 1800 2025 2 2 0 2 -1 7 0 0 -1 0.000 0 0 0 0 0 5 1800 3600 4950 3600 4950 4275 1800 4275 1800 3600 2 2 0 2 -1 7 0 0 -1 0.000 0 0 0 0 0 5 1800 5175 4950 5175 4950 5850 1800 5850 1800 5175 2 2 0 2 -1 7 0 0 -1 0.000 0 0 0 0 0 5 1800 6750 4950 6750 4950 7425 1800 7425 1800 6750 2 1 0 2 -1 7 0 0 -1 0.000 0 0 -1 1 0 2 2 1 2.00 120.00 240.00 6750 2295 5040 2295 3 0 0 2 -1 7 0 0 -1 0.000 0 1 0 5 2 1 2.00 120.00 240.00 4950 2385 5580 2700 6075 3375 5670 3870 5040 3960 3 0 0 2 -1 7 0 0 -1 0.000 0 1 0 4 2 1 2.00 120.00 240.00 4995 4050 5535 4545 5625 5265 5085 5445 3 0 1 2 -1 7 0 0 -1 6.000 0 1 0 5 2 1 2.00 120.00 240.00 5040 4050 5805 4455 5895 5850 5715 6840 4995 7065 4 0 -1 0 0 18 20 0.0000000 4 285 3045 1125 1800 $POSTOFFICE/public/\001 4 0 -1 0 0 18 24 0.0000000 4 285 3345 3150 675 ZMailer directories\001 4 0 -1 0 0 18 20 0.0000000 4 255 3045 1125 3375 $POSTOFFICE/router/\001 4 0 -1 0 0 18 20 0.0000000 4 285 3060 1125 4950 $POSTOFFICE/queue/\001 4 0 -1 0 0 18 20 0.0000000 4 285 3480 1125 6525 $POSTOFFICE/transport/\001 4 0 -1 0 0 18 20 0.0000000 4 225 2415 5805 2160 User creates mail\001 4 0 -1 0 0 18 20 0.0000000 4 285 2445 5850 2700 (/usr/lib/sendmail)\001 4 0 -1 0 0 18 20 0.0000000 4 195 825 2925 2475 12345\001 4 0 -1 0 0 18 20 0.0000000 4 285 3270 6075 3375 Submit by rename() into\001 4 0 -1 0 0 18 20 0.0000000 4 285 2445 6075 3755 router's directory\001 4 0 -1 0 0 18 20 0.0000000 4 225 3510 6075 4725 When router finishes with\001 4 0 -1 0 0 18 20 0.0000000 4 285 3525 6075 5105 the message, it rename()s\001 4 0 -1 0 0 18 20 0.0000000 4 285 3930 6075 5485 the file into the "queue"-dir,\001 4 0 -1 0 0 18 20 0.0000000 4 225 3765 6075 5865 and creates control file into\001 4 0 -1 0 0 18 20 0.0000000 4 285 3480 6075 6245 the "transport" directory.\001 4 0 -1 0 0 18 20 0.0000000 4 285 3705 6075 7020 When the transporter sees\001 4 0 -1 0 0 18 20 0.0000000 4 285 3315 6075 7400 new files in its directory,\001 4 0 -1 0 0 18 20 0.0000000 4 285 3255 6075 7780 it starts scheduling and\001 4 0 -1 0 0 18 20 0.0000000 4 225 3540 6075 8160 submission of them to the\001 4 0 -1 0 0 18 20 0.0000000 4 285 1185 6075 8540 delivery.\001 4 0 -1 0 0 18 20 0.0000000 4 195 1170 2925 4050 12345-3\001 4 0 -1 0 0 18 20 0.0000000 4 195 1170 2970 5625 12345-3\001 4 0 -1 0 0 18 20 0.0000000 4 195 1170 2970 7245 12345-3\001