MX needs 12 seconds per 1000 different remote destinations. smtp process limit = 100, bundle_recipients = 0. /usr/bin/time ./smtp-source -r 1000 fist 1.13 real 0.07 user 0.27 sys Jun 8 13:32:18 fist mx:smtpd[18174]: connect from spike.porcupine.org(168.100.1 Jun 8 13:32:31 fist mx:smtp[18209]: 085688: to=<544foo@spike.porcupine.org>, re Total time: 13 seconds /usr/bin/time ./smtp-source -r 2000 fist 2.55 real 0.21 user 0.48 sys Jun 8 13:33:23 fist mx:smtpd[18174]: connect from spike.porcupine.org(168.100.1 Jun 8 13:33:48 fist mx:smtp[18184]: 085693: to=<1041foo@spike.porcupine.org>, r Total time: 25 seconds /usr/bin/time ./smtp-source -r 5000 fist [test generating machine ran out of resources while receiving mail] /usr/bin/time ./smtp-source -r 1000 fist 1.38 real 0.17 user 0.16 sys Jun 8 15:20:33 fist mx:smtpd[27695]: connect from spike.porcupine.org(168.100.1 Jun 8 15:20:46 fist mx:smtp[27724]: 085687: to=<493foo@spike.porcupine.org>, re Total time: 13 seconds /usr/bin/time ./smtp-source -r 2000 fist 2.64 real 0.23 user 0.46 sys Jun 8 15:20:52 fist mx:smtpd[27695]: connect from spike.porcupine.org(168.100.1 Jun 8 15:21:16 fist mx:smtp[27743]: 085687: to=<1086foo@spike.porcupine.org>, r Total time: 24 seconds /usr/bin/time ./smtp-source -r 5000 fist [test generating machine ran out of resources while receiving mail]