I am using custom domain for email on outlook .I have added all the name server record mentioned on domain setting page.I have sent many emails to my account using PHP mail function but not received any one even in spam/junk folder,but when I send email from my gmail account I received email on custom domain account.

 I have also tried to send email using PHP on my three account (gmail,live.co.uk,my own domain).I have received email on my gmail and live.co.uk account but not in custom domain account .So I am not sure whats wrong is going wrong with me.

Please help...