Please someone help me out. We have a domain @trxelectronics.com and till this morning everything was fine. 

All email account can send email normally but none of us are receiving any emails from outside the domain. 

If we send emails between the us it works but if for example, I send an email from a gmail I wont receive it.

These are our work emails so you can imagine how important this is.

Regards

Kris