My server has a Reverse Lookup problem.
The problem can be seen via site:
[url removed, login to view] (enter IP [url removed, login to view] in "Reverse Lookip" column and compare it to another valid IP => mine has no PTR record).
The symptom of the problem is unable to connect from my server outside.
(Mail, URL components,...)
Solution will be solving the issue as well as functioning mail software.
OS: Ubuntu server [url removed, login to view]
access available via shh / web admin.