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Unable to receive emails from some senders

Posted on 2014-11-11
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Last Modified: 2014-11-21
Hi. we have at least now, 2 domains sending or replying to emails sent by one of our users and we dont see it come. I dont know where to start troubleshooting because i dont see their replies hitting our filter. The odd thing is that they dont get any errors/NDR either. Its like the email went out from their client and then gone..

I have verified that our domain is not listed on any popular spam databases. We also have a Barracuda Spam filter.

thanks.
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Question by:pords
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Expert Comment

by:elemist
ID: 40435736
If you can't see anything in your logs indicating the message has been received, your best bet would be to get in touch with the sending domains IT and have them investigate. It may be messages are stuck in an outbound queue somewhere, or getting dropped on the outbound.
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by:pords
ID: 40435752
Yea. that's what i have been trying to do. Unfortunately, one of the domains is Walgreen and their IT so hard to get in touch with.

Is there anything else i can do on my side? I just want to cover my bases.

thanks.
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Accepted Solution

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elemist earned 500 total points
ID: 40435765
Try running the Exchange Connectivity Analyzer - sometimes it can identify inbound issues you may not be aware of.

https://www.testexchangeconnectivity.com/

In instances where we have trouble contacting the other domains IT or they are particularly unhelpful - sometimes a copy of the emails that are going missing can show the cause. See if your user can contact the sender and have them forward the email to you via gmail or another outside mail system.

We've identified typo's, spelling mistakes, massive file attachments etc etc via this method.

You can also try the reply test - IE have your user send a blank message to the other party and have them reply with a blank message.

Can the other party send to any of your users?
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