[root@mail private]# cat /etc/postfix/private/generic
root  osslabs@yandex.ru
[root@mail private]# postmap /etc/postfix/private/generic

[root@mail private]# cat /etc/postfix/main.cf
# dobavil
smtp_generic_maps = hash:/etc/postfix/private/generic
smtp_use_tls = yes
[root@mail private]# service postfix restart

[root@mail private]# echo «test-test-test» | mutt -s «Tema-test27» llikodhuk@gmail.com

Apr 20 01:25:48 mail postfix/pickup[4900]: B20A75EF2: uid=0 from=<root>
Apr 20 01:25:48 mail postfix/cleanup[4907]: B20A75EF2: message-id=<20180420052548.GA4903@mail.osslabs.ru>
Apr 20 01:25:48 mail postfix/qmgr[4901]: B20A75EF2: from=<root@mail.osslabs.ru>, size=491, nrcpt=1 (queue active)
Apr 20 01:25:48 mail postfix/smtp[4909]: certificate verification failed for smtp.yandex.ru[87.250.250.38]:25: untrusted issuer /C=PL/O=Unizeto Sp. z o.o./CN=Certum CA
Apr 20 01:25:49 mail postfix/smtp[4909]: B20A75EF2: to=<llikodhuk@gmail.com>, relay=smtp.yandex.ru[87.250.250.38]:25, delay=0.33, delays=0.02/0.01/0.27/0.03, dsn=5.5.4, status=bounced (host smtp.yandex.ru[87.250.250.38] said: 503 5.5.4 Error: send AUTH command first. (in reply to MAIL FROM command))
Apr 20 01:25:49 mail postfix/cleanup[4907]: 24AA65EF5: message-id=<20180420052549.24AA65EF5@mail.osslabs.ru>
Apr 20 01:25:49 mail postfix/qmgr[4901]: 24AA65EF5: from=<>, size=2410, nrcpt=1 (queue active)
Apr 20 01:25:49 mail postfix/bounce[4911]: B20A75EF2: sender non-delivery notification: 24AA65EF5
Apr 20 01:25:49 mail postfix/qmgr[4901]: B20A75EF2: removed
Apr 20 01:25:49 mail postfix/local[4912]: 24AA65EF5: to=<root@mail.osslabs.ru>, relay=local, delay=0.02, delays=0.01/0/0/0, dsn=2.0.0, status=sent (delivered to mailbox)
Apr 20 01:25:49 mail postfix/qmgr[4901]: 24AA65EF5: removed