2014/12/23-You need a PTR record that resolves 128.199.39.109 to the hostname of your sending server. Might also want to look into SPF records for your ...
The mail server's source IP address which is trying to send mail to parabon.com does not have proper reverse DNS entries setup or the DNS server for that mail ...
2018/8/22-1.1 shows no reverse for that IP. Edit: If this is meant to be you as an authenticated user sending mail I can not see anything in the log ...
2021/2/16-Description · 1 . Check the hostname resolves from a workstation other than the server: · 2 . Make sure the IP from the above command is bound to ...
2012/9/7-This normally means that the address you are trying to send email to, the server is using reverse look ups. This means you send an email from ...