Exchange 2013 re-enabled email account not receiving email outside of the organization.

It's been 4 hours. I accidentally disabled an email account and then re-enabled it. It's been 4 hours and email from within the organization started coming in a half an hour later, but email from outside the organization has yet to come in. However, it's not being bounced back?

Is this just a propagation issue for this 1 email account??

Exchange 2013 on Server 2012 standard.
jmahlmannAsked:
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tshearonConnect With a Mentor Commented:
Do you receive your inbound internet E-Mail from a smart host device or some other device? Does that device do some type of LDAP at certain intervals to check the validity of senders? If so then you probably need to just have that device/service updated and you should be good to go. You can verify it by checking your smart host logs for the inbound e-mails.
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