I'm running courier 0.25 on Redhat linux 6.2 (i386). Today, I edited the 'module.esmtp' file in /etc/courier, and lowered the value of MAXDELS from the default of 40, down to 2. When I started courier, this is what I got in the log, and it kept pausing for a minute each time. This happens for a few other values of MAXDELS too. If I restore it to 40, I don't see the weird log entries, and courier doesn't stop for 1 minute every short while. What's happening here?

Aug 6 17:02:30 mobile courierd: Courier 0.25 Copyright 1999-2000 Double
Precision, Inc. Aug 6 17:02:30 mobile courierd: Installing [0/0] Aug 6 17:02:30 mobile courierd: Installing uucp Aug 6 17:02:30 mobile courierd: Installed: module.uucp - Courier 0.25 Copyright
1999-2000 Double Precision, Inc. Aug 6 17:02:30 mobile courierd: Installing local Aug 6 17:02:30 mobile courierd: Installed: module.local - Courier 0.25
Copyright 1999-2000 Double Precision, Inc. Aug 6 17:02:30 mobile courierd: Installing esmtp Aug 6 17:02:30 mobile courierd: Installed: module.esmtp - Courier 0.25
Copyright 1999-2000 Double Precision, Inc. Aug 6 17:02:30 mobile courierd: Installing dsn Aug 6 17:02:30 mobile courierd: Installed: module.dsn - Courier 0.25 Copyright
1999-2000 Double Precision, Inc. Aug 6 17:02:30 mobile courierd: Initializing uucp Aug 6 17:02:30 mobile courierd: Initializing local Aug 6 17:02:30 mobile courierd: Initializing esmtp Aug 6 17:02:30 mobile courierd: Initializing dsn Aug 6 17:02:30 mobile courierd: Started ./courieruucp, pid=21515, maxdels=4,
maxhost=4, maxrcpt=16 Aug 6 17:02:30 mobile courierd: Started ./courierlocal, pid=21516, maxdels=10,
maxhost=4, maxrcpt=1 Aug 6 17:02:30 mobile courierd: Started ./courieresmtp, pid=21517, maxdels=2,
maxhost=4, maxrcpt=100 Aug 6 17:02:30 mobile courierd: Started ./courierdsn, pid=21518, maxdels=4,
maxhost=1, maxrcpt=1 Aug 6 17:02:30 mobile courierd: queuelo=200, queuehi=400 Aug 6 17:02:30 mobile courierd: Purging /var/spool/courier/msgq Aug 6 17:02:30 mobile courierd: Purging /var/spool/courier/msgs Aug 6 17:02:30 mobile courierd: newmsg,id=000530A3.398D6EAC.000053AF Aug 6 17:02:30 mobile courierd:
started,id=000530A3.398D6EAC.000053AF,from=<ar...@anand.org>,module=esmtp,host=uu.net,addr=<nob...@uu.net> Aug 6 17:02:30 mobile courieresmtp:
id=000530A3.398D6EAC.000053AF,from=<ar...@anand.org>,addr=<nob...@uu.net>: DNS
lookup failed. Aug 6 17:02:30 mobile courieresmtp:
id=000530A3.398D6EAC.000053AF,from=<ar...@anand.org>,addr=<nob...@uu.net>,status:
deferred Aug 6 17:02:30 mobile courierd: newmsg,id=000530A5.398D6EAD.000053B2 Aug 6 17:02:30 mobile courierd:
started,id=000530A5.398D6EAD.000053B2,from=<ar...@anand.org>,module=esmtp,host=uu.net,addr=<nob...@uu.net> Aug 6 17:02:30 mobile courieresmtp:
id=000530A5.398D6EAD.000053B2,from=<ar...@anand.org>,addr=<nob...@uu.net>: No such
file or directory Aug 6 17:02:30 mobile courieresmtp:
id=000530A5.398D6EAD.000053B2,from=<ar...@anand.org>,addr=<nob...@uu.net>,status:
deferred Aug 6 17:02:30 mobile courierd: newmsg,id=000530A7.398D6EAE.000053B4 Aug 6 17:02:30 mobile courierd: newmsg,id=000530A9.398D6EAE.000053B6 Aug 6 17:02:30 mobile courierd: newmsg,id=000530AB.398D6EAF.000053B8 Aug 6 17:02:30 mobile courierd: newmsg,id=000530AD.398D6EB8.000053BA Aug 6 17:02:30 mobile courierd: newmsg,id=000530AF.398D6EB9.000053BC Aug 6 17:02:30 mobile courierd: newmsg,id=000530B1.398D6EBA.000053BE Aug 6 17:02:30 mobile courierd: newmsg,id=000530B3.398D6EBA.000053C0 Aug 6 17:02:30 mobile courierd: newmsg,id=000530B5.398D6EBB.000053C2 Aug 6 17:02:30 mobile courierd: newmsg,id=000530B7.398D6EBD.000053C4 Aug 6 17:02:30 mobile courierd: newmsg,id=000530B9.398D6EBE.000053C6 Aug 6 17:02:30 mobile courierd: newmsg,id=000530BB.398D6EBE.000053C8 Aug 6 17:02:30 mobile courierd: newmsg,id=000530BD.398D6EBF.000053CA Aug 6 17:02:30 mobile courierd: newmsg,id=000530BF.398D6EC7.000053CC Aug 6 17:02:30 mobile courierd: newmsg,id=000530C1.398D6EC8.000053CE Aug 6 17:02:30 mobile courierd: newmsg,id=000530C3.398D6EC8.000053D0 Aug 6 17:02:30 mobile courierd: newmsg,id=000530C5.398D6EC9.000053D2 Aug 6 17:02:30 mobile courierd: newmsg,id=000530C7.398D6ECA.000053D4 Aug 6 17:02:30 mobile courierd: newmsg,id=000530C9.398D6ECB.000053D6 Aug 6 17:02:30 mobile courierd: newmsg,id=000530CB.398D6ECC.000053D8 Aug 6 17:02:30 mobile courierd: newmsg,id=000530CD.398D6ECC.000053DA Aug 6 17:02:31 mobile courierd: newmsg,id=000530CF.398D6ECD.000053DC Aug 6 17:02:31 mobile courierd: newmsg,id=000530D1.398D6ECE.000053DE Aug 6 17:02:31 mobile courierd: newmsg,id=000530D3.398D6ECF.000053E0 Aug 6 17:02:31 mobile courierd: newmsg,id=000530D5.398D6ED5.000053E2 Aug 6 17:02:31 mobile courierd: newmsg,id=000530D7.398D6ED5.000053E4 Aug 6 17:02:31 mobile courierd: newmsg,id=000530D9.398D6ED6.000053E6 Aug 6 17:02:31 mobile courierd: newmsg,id=000530DB.398D6ED7.000053E8 Aug 6 17:02:31 mobile courierd: newmsg,id=000530DD.398D6ED8.000053EA Aug 6 17:02:31 mobile courierd: newmsg,id=000530DF.398D6ED8.000053EC Aug 6 17:02:31 mobile courierd: Waiting. shutdown time=none, wakeup time=none,
queuedelivering=31, inprogress=2 Aug 6 17:02:31 mobile courierd:
started,id=000530BF.398D6EC7.000053CC,from=<ar...@anand.org>,module=esmtp,host=iconnect.co.ke,addr=<nob...@iconnect.co.ke> Aug 6 17:02:31 mobile courierd: completed,id=000530A3.398D6EAC.000053AF Aug 6 17:02:31 mobile courieresmtp:
id=000530BF.398D6EC7.000053CC,from=<ar...@anand.org>,addr=<nob...@iconnect.co.ke>:
DNS lookup failed. Aug 6 17:02:31 mobile courieresmtp:
id=000530BF.398D6EC7.000053CC,from=<ar...@anand.org>,addr=<nob...@iconnect.co.ke>,status:
deferred Aug 6 17:02:31 mobile courierd:
started,id=000530C1.398D6EC8.000053CE,from=<ar...@anand.org>,module=esmtp,host=iconnect.co.ke,addr=<nob...@iconnect.co.ke> Aug 6 17:02:31 mobile courierd: completed,id=000530A5.398D6EAD.000053B2 Aug 6 17:02:31 mobile courierd: Waiting. shutdown time=none, wakeup time=Sun
Aug 6 17:07:31 2000, queuedelivering=31, inprogress=2 Aug 6 17:02:31 mobile courierd: MODULE esmtp ABORTED. Aug 6 17:02:31 mobile courierd: Will restart in 60 seconds. Aug 6 17:03:31 mobile courierd: Loading STATIC transport module libraries. Aug 6 17:03:31 mobile courierd: Courier 0.25 Copyright 1999-2000 Double
Precision, Inc. Aug 6 17:03:31 mobile courierd: Installing [0/0] Aug 6 17:03:31 mobile courierd: Installing uucp Aug 6 17:03:31 mobile courierd: Installed: module.uucp - Courier 0.25 Copyright
1999-2000 Double Precision, Inc. Aug 6 17:03:31 mobile courierd: Installing local Aug 6 17:03:31 mobile courierd: Installed: module.local - Courier 0.25
Copyright 1999-2000 Double Precision, Inc. Aug 6 17:03:31 mobile courierd: Installing esmtp Aug 6 17:03:31 mobile courierd: Installed: module.esmtp - Courier 0.25
Copyright 1999-2000 Double Precision, Inc. Aug 6 17:03:31 mobile courierd: Installing dsn Aug 6 17:03:31 mobile courierd: Installed: module.dsn - Courier 0.25 Copyright
1999-2000 Double Precision, Inc. Aug 6 17:03:31 mobile courierd: Initializing uucp Aug 6 17:03:31 mobile courierd: Initializing local Aug 6 17:03:31 mobile courierd: Initializing esmtp Aug 6 17:03:31 mobile courierd: Initializing dsn Aug 6 17:03:31 mobile courierd: Started ./courieruucp, pid=21530, maxdels=4,
maxhost=4, maxrcpt=16 Aug 6 17:03:31 mobile courierd: Started ./courierlocal, pid=21531, maxdels=10,
maxhost=4, maxrcpt=1 Aug 6 17:03:31 mobile courierd: Started ./courieresmtp, pid=21532, maxdels=2,
maxhost=4, maxrcpt=100 Aug 6 17:03:31 mobile courierd: Started ./courierdsn, pid=21533, maxdels=4,
maxhost=1, maxrcpt=1 Aug 6 17:03:31 mobile courierd: queuelo=200, queuehi=400 Aug 6 17:03:31 mobile courierd: Purging /var/spool/courier/msgq Aug 6 17:03:31 mobile courierd: Purging /var/spool/courier/msgs Aug 6 17:03:31 mobile courierd:
started,id=000530A7.398D6EAE.000053B4,from=<ar...@anand.org>,module=esmtp,host=uu.net,addr=<nob...@uu.net> Aug 6 17:03:31 mobile courierd:
started,id=000530A9.398D6EAE.000053B6,from=<ar...@anand.org>,module=esmtp,host=uu.net,addr=<nob...@uu.net> Aug 6 17:03:31 mobile courieresmtp:
id=000530A7.398D6EAE.000053B4,from=<ar...@anand.org>,addr=<nob...@uu.net>: DNS
lookup failed. Aug 6 17:03:31 mobile courieresmtp:
id=000530A7.398D6EAE.000053B4,from=<ar...@anand.org>,addr=<nob...@uu.net>,status:
deferred Aug 6 17:03:31 mobile courieresmtp:
id=000530A9.398D6EAE.000053B6,from=<ar...@anand.org>,addr=<nob...@uu.net>: DNS
lookup failed. Aug 6 17:03:31 mobile courieresmtp:
id=000530A9.398D6EAE.000053B6,from=<ar...@anand.org>,addr=<nob...@uu.net>,status:
deferred Aug 6 17:03:31 mobile courierd: Waiting. shutdown time=none, wakeup time=Sun
Aug 6 17:07:31 2000, queuedelivering=31, inprogress=2 Aug 6 17:03:31 mobile courierd:
started,id=000530BF.398D6EC7.000053CC,from=<ar...@anand.org>,module=esmtp,host=iconnect.co.ke,addr=<nob...@iconnect.co.ke> Aug 6 17:03:31 mobile courierd: completed,id=000530A7.398D6EAE.000053B4 Aug 6 17:03:31 mobile courierd:
started,id=000530C1.398D6EC8.000053CE,from=<ar...@anand.org>,module=esmtp,host=iconnect.co.ke,addr=<nob...@iconnect.co.ke> Aug 6 17:03:31 mobile courierd: completed,id=000530A9.398D6EAE.000053B6 Aug 6 17:03:31 mobile courierd: Waiting. shutdown time=none, wakeup time=Sun
Aug 6 17:07:31 2000, queuedelivering=31, inprogress=2 Aug 6 17:03:31 mobile courierd: MODULE esmtp ABORTED. Aug 6 17:03:31 mobile courierd: ABNORMAL TERMINATION, exit status: 1 Aug 6 17:03:31 mobile courierd: Will restart in 60 seconds. Aug 6 17:04:31 mobile courierd: Loading STATIC transport module libraries. Aug 6 17:04:31 mobile courierd: Courier 0.25 Copyright 1999-2000 Double
Precision, Inc. Aug 6 17:04:31 mobile courierd: Installing [0/0] Aug 6 17:04:31 mobile courierd: Installing uucp Aug 6 17:04:31 mobile courierd: Installed: module.uucp - Courier 0.25 Copyright
1999-2000 Double Precision, Inc. Aug 6 17:04:31 mobile courierd: Installing local Aug 6 17:04:31 mobile courierd: Installed: module.local - Courier 0.25
Copyright 1999-2000 Double Precision, Inc. Aug 6 17:04:31 mobile courierd: Installing esmtp Aug 6 17:04:31 mobile courierd: Installed: module.esmtp - Courier 0.25
Copyright 1999-2000 Double Precision, Inc. Aug 6 17:04:31 mobile courierd: Installing dsn Aug 6 17:04:31 mobile courierd: Installed: module.dsn - Courier 0.25 Copyright
1999-2000 Double Precision, Inc. Aug 6 17:04:31 mobile courierd: Initializing uucp Aug 6 17:04:31 mobile courierd: Initializing local Aug 6 17:04:31 mobile courierd: Initializing esmtp Aug 6 17:04:31 mobile courierd: Initializing dsn Aug 6 17:04:31 mobile courierd: Started ./courieruucp, pid=21543, maxdels=4,
maxhost=4, maxrcpt=16 Aug 6 17:04:31 mobile courierd: Started ./courierlocal, pid=21544, maxdels=10,
maxhost=4, maxrcpt=1 Aug 6 17:04:31 mobile courierd: Started ./courieresmtp, pid=21545, maxdels=2,
maxhost=4, maxrcpt=100 Aug 6 17:04:31 mobile courierd: Started ./courierdsn, pid=21546, maxdels=4,
maxhost=1, maxrcpt=1 Aug 6 17:04:31 mobile courierd: queuelo=200, queuehi=400 Aug 6 17:04:31 mobile courierd: Purging /var/spool/courier/msgq Aug 6 17:04:31 mobile courierd: Purging /var/spool/courier/msgs Aug 6 17:04:31 mobile courierd:
started,id=000530AB.398D6EAF.000053B8,from=<ar...@anand.org>,module=esmtp,host=uu.net,addr=<nob...@uu.net> Aug 6 17:04:31 mobile courierd:
started,id=000530AD.398D6EB8.000053BA,from=<ar...@anand.org>,module=esmtp,host=africaonline.co.ke,addr=<nob...@africaonline.co.ke> Aug 6 17:04:31 mobile courieresmtp:
id=000530AB.398D6EAF.000053B8,from=<ar...@anand.org>,addr=<nob...@uu.net>: DNS
lookup failed. Aug 6 17:04:31 mobile courieresmtp:
id=000530AB.398D6EAF.000053B8,from=<ar...@anand.org>,addr=<nob...@uu.net>,status:
deferred Aug 6 17:04:31 mobile courieresmtp:
id=000530AD.398D6EB8.000053BA,from=<ar...@anand.org>,addr=<nob...@africaonline.co.ke>:
DNS lookup failed. Aug 6 17:04:31 mobile courieresmtp:
id=000530AD.398D6EB8.000053BA,from=<ar...@anand.org>,addr=<nob...@africaonline.co.ke>,status:
deferred Aug 6 17:04:31 mobile courierd: Waiting. shutdown time=none, wakeup time=Sun
Aug 6 17:07:31 2000, queuedelivering=31, inprogress=2 Aug 6 17:04:31 mobile courierd: SHUTDOWN: Stopping...