Troubleshoot Sendmail/PHP from server

We currently cannot receive email sent from our web server. Our email address uses the same suffix as our domain. For example Emails sent to other email address can receive the email with no problem. Ex: If the web server sends an email to person@[login to view URL] - they may or may not get the email however if the web server sends an email to person@[login to view URL] they will get the email. This appears to be a DNS hosting issue. But we are looking for the right person to test this. ## Deliverables Rent A Coder requirements notice: As originally posted, this bid request does not have complete details. Should a dispute arise and this project go into arbitration "as is", the contract's vagueness might cause it to be interpreted against you, even though you were acting in good-faith. So for your protection, if you are interested in this project, please work-out and document the requirements onsite. Successful process: 1. A php script sends out an email from the web server. 2. These email recipients receive the email. What's currently happening 1. It appears the emails are being sent out. 2. However if the email address belongs to one of our employees - it will not work. To test: I will provide the following. 1. Test script 2. access to the web server (command line/ftp) 3. one email account to test with