This is one SMTP session, with a host that has bad DNS.
Below is an SMTP session from a host that has bad DNS.
> postfix/smtpd[8568]: warning: hostname zg-0520a-211.stretchoid.com does
> not resolve to address 192.241.205.222: Name or service not known
> postfix/smtpd[8568]: connect from unknown[192.241.205.222]
> postfix/smtpd[8568]: lost connection after UNKNOWN from
> unknown[192.241.205.222]
> postfix/smtpd[8568]: disconnect from unknown[192.241.205.222]
> unknown=0/1 commands=0/1
Below is a DIFFERENT SMTP session where Postfix receives an
incomplete HAPROXY message.
> postfix/smtpd[8585]: warning: haproxy read: unexpected EOF
> postfix/smtpd[8585]: connect from unknown[unknown]
> postfix/smtpd[8585]: disconnect from unknown[unknown] commands=0/0
Note that HAPROXY sends one message at the BEGINNING of an SMTP
session. There are no HAPROXY messages at any other point in time.
Wietse
