Same domain emails are bouncing back others are working fine

I have moved recently my website to a VPS everything working well except for the email.

Emails are delivering well on any domain other than the domain where website is hosted.
E.g. emails are sent to or But on domain this is where website is hosted and if i send email like I got bounce back stating “Unknown user: sale”

Please help me in fixing this problem. I am thinking this could be MX record issue but I am not sure.

For email service I am using office 360.


Leave a Reply