Some of the messages I am sending from the server using mail() in PHP are not getting delivered. When I look in the maillog (which you must do as *root* i found out) i find the following error messages after each of these failures.
delivery 72578: failure: Connected_to_68.6.19.3_but_sender_was_rejected./Remote_host_said:_553_hostname.domainname.com_does_not_exist/
delivery 72581: failure: Sorry,_I_couldn't_find_any_host_named_hostname.domainname.com
This perplexes me because it is true, the combination of hostname.domainname.com does not exist to my knowledge. It was set by Rackshack when I purchased the server but probably does not exist in any real sense as a 'remote_host'.
My question is, where can i modify that hostname to a legitimate 'remote_host' so auto-generated email from my server is deliverable to everyone and what would i set it to so that it is 'legitimate?'
Thank you for any help you can offer,
Ragnar