Mimecast blocking all Gainsight Emails

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  • Problem
  • Updated 3 months ago
  • Acknowledged
We are seeing more and more of our clients implementing Mimecast and other email content filtering solutions and this is blocking all Gainsight emails.  Internally we just implemented Mimecast as well and all Gainsight emails are being blocked.  We opened up emails from gainsightapp.com for results to come through but were still not getting individual internal emails sent from CoPilots Outreaches.  Gainsight Support provide us with the following two IP addresses to whitelist which we are going to give a try: &

Is Gainsight taking measures to improve their emails getting through these email content filtering systems?

This is really painful for us because we primarily send transactional emails in a low touch model with Gainsight and we are putting an increasing burden on our CSM team to send out these emails manually when they are blocked.
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Jeffrey DaSilva, Champion

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Posted 8 months ago

  • 5
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Andrew Lay, Employee

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Hi Jeffrey,

Thank you for this post.  

The increase in content filtering service activity is great for security and the fight against spam, but can raise challenges for legitimate companies.  We are actively working to protect and improve sending reputation on multiple fronts like warming and increasing sending IP addresses and working with companies that specialize in deliverability.

Please review the below article about deliverability and let me know if you have questions.  I’ll check with the Support Team on your current issue and monitor status as well.



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Sai Ram Pulluri, Official Rep

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Hi Jeffery, I recently started going through all of the pending posts, was checking to see if this is solved? 

Please let us know if this issue still exists.
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Sagan Sherlin, Champion

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We actually have an ongoing issue here regarding Mimecast blocking the internal email links that we send.  Which can be rather annoying if you're trying to test out the links.  We've been working with both Gainsight, Mimecast, and our Internal IT to try and get this resolved.

Any feedback on how others were able to resolve this is much appreciated!