Hi I added zabbix to test connections - all works fine but sometimes i found in logs "too many errors after EHLO"
logs: Feb 10 20:49:21 thebe4 postfix/smtpd[6609]: connect from zabbix.domain.ltd[xxx.xxx.xxx.68] Feb 10 20:49:21 thebe4 postfix/smtpd[6609]: Anonymous TLS connection established from zabbix.domain.ltd[xxx.xxx.xxx.68]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits) Feb 10 20:49:21 thebe4 postfix/smtpd[6609]: too many errors after EHLO from zabbix.domain.ltd[xxx.xxx.xxx.68] Feb 10 20:49:21 thebe4 postfix/smtpd[6609]: disconnect from zabbix.domain.ltd[xxx.xxx.xxx.68] ehlo=2 starttls=1 noop=1 commands=4 ip xxx.xxx.xxx.68 is add in mynetworks my restryctions about helo: smtpd_helo_required = yes smtpd_helo_restrictions = permit_mynetworks, reject_unauth_pipelining, reject_invalid_helo_hostname and client: smtpd_client_restrictions = # ip black / whitlist check_client_access cidr:/etc/postfix/client_checks, ---> I've added zabbix IP too reject_unauth_pipelining, permit, And I don't know why some times all works fine and sometimes i get this error in logs zabbix connect every 1 minut
