If emails sent from your account are not being received, you can check the delivery status of those emails from within the platform using the Email Log.
Addressing Email Receipt Problems
If specific individuals are unable to receive email from the platform, Microsoft provides these instructions regarding managing Outlook's Safe Sender list.
If you find that the Safe Sender list is still not assisting, you may need to contact support to get the user removed from the blacklist.
If several or all recipients in your organization are unable to receive email from the platform, you will likely need to have your IT Department adjust your organization's email policy.
Our addresses are:
Restoring Email Delivery
Our email server will stop attempting to deliver email to addresses for which we have received a permanent delivery failure response. After any problems with receipt have been corrected, you will need to contact us and request that we begin delivering email again. We can usually restore email delivery within one business day of receiving a request. Past emails will not be resent when delivery is restored for an address, but new messages will be sent according to the Communication Settings in your account.