Как настроить отправку сообщения Cron?

Start duply v1.6.0, time is 2017-07-04 04:31:53.
Using profile '/etc/duply/main'.
Using installed duplicity version 0.6.26, python 2.6.6, gpg 2.0.14 (Home: ~/.gnupg), awk 'GNU Awk 3.1.7', bash '4.1.2(2)-release (x86_64-redhat-linux-gnu)'.
Signing disabled. Not GPG_KEY entries in config.
Test - Encryption with passphrase (OK)
Test - Decryption with passphrase (OK)
Test - Compare (OK)
Cleanup - Delete '/tmp/duply.3699.1499131913_*'(OK)
--- Start running command PRE at 04:31:54.075 ---
Skipping n/a script '/etc/duply/main/pre'.
--- Finished state OK at 04:31:54.088 - Runtime 00:00:00.012 ---
--- Start running command BKP at 04:31:54.097 ---
Duplicity 0.6 series is being deprecated:
See http://www.nongnu.org/duplicity/
Reading globbing filelist /etc/duply/main/exclude
Local and Remote metadata are synchronized, no sync needed.
Last full backup date: Fri Jun 30 07:54:33 2017
--------------[ Backup Statistics ]--------------
StartTime 1499131915.59 (Tue Jul  4 04:31:55 2017)
EndTime 1499132049.03 (Tue Jul  4 04:34:09 2017)
ElapsedTime 133.45 (2 minutes 13.45 seconds)
SourceFiles 199161
SourceFileSize 14418048020 (13.4 GB)
NewFiles 98
NewFileSize 110786 (108 KB)
DeletedFiles 0
ChangedFiles 2
ChangedFileSize 179197 (175 KB)
ChangedDeltaSize 0 (0 bytes)
DeltaEntries 100
RawDeltaSize 199707 (195 KB)
TotalDestinationSizeChange 63614 (62.1 KB)
Errors 0
-------------------------------------------------
--- Finished state OK at 04:34:11.032 - Runtime 00:02:16.934 ---
--- Start running command POST at 04:34:11.042 ---
Skipping n/a script '/etc/duply/main/post'.
--- Finished state OK at 04:34:11.055 - Runtime 00:00:00.012 ---

echo "Test mail from postfix" | mail -s "Test Postfix" my@mail.ru

еcho test mail | mail -s "test" root && sudo tail -f /var/log/maillog

Jul  4 05:31:01 root postfix/pickup[2016]: DED423F4BF: uid=0 from=<root>
Jul  4 05:31:01 root postfix/cleanup[2847]: DED423F4BF: message-id=<20170704023101.DED423F4BF@mail.mail.ru>
Jul  4 05:31:01 root postfix/qmgr[2017]: DED423F4BF: from=<root@mail.mail.ru>, size=500, nrcpt=1 (queue active)
Jul  4 05:31:01 root postfix/cleanup[2847]: E92123F4B9: message-id=<20170704023101.DED423F4BF@mail.mail.ru>
Jul  4 05:31:01 root postfix/qmgr[2017]: E92123F4B9: from=<root@mail.ru>, size=645, nrcpt=1 (queue active)
Jul  4 05:31:01 root postfix/local[2849]: DED423F4BF: to=<root@mail.ru>, orig_to=<root>, relay=local, delay=0.07, delays=0.04/0.02/0/$
Jul  4 05:31:01 root postfix/qmgr[2017]: DED423F4BF: removed
Jul  4 05:31:03 root postfix/smtp[2850]: E92123F4B9: to=<my@mail.ru>, orig_to=<root>, relay=mx.yandex.net[2a02:6b8::89]:25, delay=1.1$
Jul  4 05:31:03 root postfix/qmgr[2017]: E92123F4B9: removed

Jul  4 04:32:01 root anacron[2877]: Job `cron.daily' started
Jul  4 04:32:01 root run-parts(/etc/cron.daily)[3910]: starting cups
Jul  4 04:32:01 root run-parts(/etc/cron.daily)[3918]: finished cups
Jul  4 04:32:01 root run-parts(/etc/cron.daily)[3910]: starting logrotate
Jul  4 04:32:01 root run-parts(/etc/cron.daily)[3925]: finished logrotate
Jul  4 04:32:01 root run-parts(/etc/cron.daily)[3910]: starting makewhatis.cron
Jul  4 04:32:02 root run-parts(/etc/cron.daily)[4083]: finished makewhatis.cron
Jul  4 04:32:02 root run-parts(/etc/cron.daily)[3910]: starting mlocate.cron
Jul  4 04:32:02 root run-parts(/etc/cron.daily)[4094]: finished mlocate.cron
Jul  4 04:32:02 root run-parts(/etc/cron.daily)[3910]: starting prelink
Jul  4 04:32:02 root run-parts(/etc/cron.daily)[4106]: finished prelink
Jul  4 04:32:02 root run-parts(/etc/cron.daily)[3910]: starting readahead.cron
Jul  4 04:32:02 root run-parts(/etc/cron.daily)[4118]: finished readahead.cron
Jul  4 04:32:02 root run-parts(/etc/cron.daily)[3910]: starting tmpwatch
Jul  4 04:32:02 root run-parts(/etc/cron.daily)[4126]: finished tmpwatch
Jul  4 04:32:02 root anacron[2877]: Job `cron.daily' terminated
Jul  4 04:32:02 root anacron[2877]: Normal exit (1 job run)