troubleshooting Question

Email from one company not arriving

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CTSLAFlag for United States of America asked on
Email ServersExchangeEmail Clients
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I switched a client company to Rackspace email last week, but my client company, smithfoods.com, does not receive email from one particular company, easyreporting.com (both names fictitious).  The domain registrar is Network Solutions.  The previous email provider was EarthLink for business.  It's been a full week since I changed the MX records, so it should have propagated by now.

I spoke with tech support at easyreporting.com, the guy that runs the Exchange server, and he says when they send mail to any address at smithfoods.com, it ends up being directed to EarthLink, the previous email provider, instead of Rackspace, the current email provider.  So it seems there is root name server on the internet that has not been updated - at least that's my best guess.  He sent from his own computer, which has never sent to smithfoods.com before.  I've seen before where the auto-saved address in Outlook will sometimes remember the old settings, but that can't be the case in this scenario.

So my questions are:
1- Is there a way to force a re-propagation of the MX records?  
2- Am I off-base in my assumptions and there might be something else causing this?
3- Can anyone offer a idea of what else might be causing this.

Thank you in advance for any info you can provide.
ASKER CERTIFIED SOLUTION
Adam Brown
Cloud Security Consultant

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