Hornet Security 450 4.1.1

Email rejected with 450 4.1.1 when sending email from external (gmail,yahoo, etc) to user domain.

Cause

Hornet Security mailgates cannot connect to customer's mailserver when it met criteria as below;

to have multiple IP/Hostname and the order is not the same. E.g server2.norman.com.my#20;server1.norman.com.my#10
server2.norman.com.my is not listening/not active

Solution

Put the order correctly/ or make sure the first IP/Hostname did listen to the mailgates for SMTP validation.

server1.norman.com.my#10;server2.norman.com.my#20

Article ID: 136, Created: 4/27/2018 at 10:53 AM, Modified: 5/21/2018 at 3:45 PM