Help me understand FDQN as some of my mails are bouncing back
I am new to owning the VPS and learning alot of things, i search for for the answers on DO and came across alot of posts some made few sense and some none probably due to my lack of knowledge.
The problem I am having is after moving to DO some of my emails that I send are getting bounced back and the error I get it as following
(reason: 550 Access denied - Invalid HELO name (See RFC2821 22.214.171.124))
After googling some posts suggests I need to look into my configuration to make sure they are done right for example make sure FDQN is setup.
When I run the command hostname i see my hosting listed on terminal so i am assuming that right, when i run the command hostname -f i see the following on terminal
So here is my first question is that right? is localhost.localdomain what we are supposed to be using? if not then how do i fix it and what to i change that to?
inside my host file i see the following lines
127.0.1.1 localhost.localdomain hostname hostname
Is this setup right? what am i missing?
Any help will be really appreciated
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.×