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Using multiple MX records for internal Exchange and Google Apps - turns to mails leakage to higher Delivery Precedence MX's

IT_Group1
IT_Group1 asked
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Last Modified: 2015-01-05
Hi guys,

One of our customers is working with multiple MX records as you can see in the attached screenshot.
The primary mail server is Exchange based, while the lower Delivery Precedence MX's are Google Apps based.

Even though the Exchange is fully available 24/7 with ~8.5 sec SMTP Transaction Time, some mails leak to Google Apps.

- What may be the reason for this leakage?
- Is there something wrong with our configuration?

Thanks in advance
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