Office 365 user unable to receive emails from External Domains

Hi we have some users using one of our Office 365 domains ( email addresses which is only receiving emails  from Office 365 email users and not from any outside mail id’s (external domains - yahoo/gmail/hotmail.....)

The domain has been setup in O365 as an accepted domain, and MX records are pointed to Office 365.

Any idea where to look for the issue?
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nutekconsultantAuthor Commented:
I have attached remote connectivity test I just did to the domain.
Vasil Michev (MVP)Commented:
Well it fails on the MX record check, maybe it's a DNS propagation issue. Use the free tools available on the net to verify the DNS record from at least 2 different locations.

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nutekconsultantAuthor Commented:
I just checked and I am able to send out from the O365 domain to external email addresses.   Just not receiving.
I will verify the DNS
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