вижу следующее сообщение об ошибке при попытке отправить электронное письмо через postfix на Centos 7, в то время как я могу получать и загружать сообщения, не видя ошибок
postfix/smtpd[24532]: connect from unknown[5.31.230.96]
postfix/smtpd[24532]: disconnect from unknown[5.31.230.96]
или
postfix/smtpd[24366]: connect from unknown[5.31.230.96]
postfix/smtpd[24366]: warning: Wrapper-mode request dropped from unknown[5.31.230.96] for service submission. TLS context initial...our logs.
postfix/smtpd[24366]: disconnect from unknown[5.31.230.96]
postfix/smtpd[24366]: connect from unknown[5.31.230.96]
postfix/smtpd[24366]: warning: Wrapper-mode request dropped from unknown[5.31.230.96] for service submission. TLS context initial...our logs.
postfix/smtpd[24366]: disconnect from unknown[5.31.230.96]
postfix/smtpd[24369]: connect from unknown[5.31.183.32]
postfix/smtpd[24369]: lost connection after EHLO from unknown[5.31.183.32]
postfix/smtpd[24369]: disconnect from unknown[5.31.183.32]
или
postfix/smtpd[24371]: connect from unknown[unknown]
postfix/smtpd[24371]: lost connection after CONNECT from unknown[unknown]
postfix/smtpd[24371]: disconnect from unknown[unknown]
конфигурация postfix / dovecot согласно статье https://www.rosehosting.com/blog/mailserver-with-virtual-users-and-domains-using-postfix-and-dovecot-on-a-centos-6-vps/