CRM User Stopped Receiving Emails From systemgenerated @

CRM User Stopped Receiving Emails From systemgenerated @

One of my users stopped receiving emails from systemgenerated at

For example, he no longer receives email reminders or daily activity reports from the above stated email address.
  1. Has anyone experienced this?
  2. Any suggested solutions?
Thank you!

More details....

This happened a few weeks ago, and support said they "unblocked" his email. After further inquiry, support was  not able to provide a valid explanation of why his email was blocked. He was able to send emails to leads and contacts, but Zoho CRM would not email him! 
  1. They blamed it on one email he sent to a lead. The lead's email server was bouncing the email he sent. So said they blocked his email.  This makes no sense why system emails would stop being sent to this user.
  2. They also blamed our DKIM, but that is set up properly.
  3. After escalation, the higher level tech was again unable to even understand the problem. I believe he thought emails were not getting sent to leads.
Any help would be greatly appreciated. If we can't get emails from Zoho CRM the software is basically useless.

    Zoho Marketing Automation

            Zoho Pagesense Resources

              Zoho SalesIQ Resources

                    Zoho TeamInbox Resources

                      Zoho DataPrep Resources

                        Zoho CRM Plus Resources

                          Zoho Books Resources

                            Zoho Subscriptions Resources

                              Zoho Desk Resources

                                Zoho Projects Resources

                                  Zoho Sprints Resources

                                    Qntrl Resources

                                      Zoho Creator Resources

                                        Zoho WorkDrive Resources

                                            Zoho Campaigns Resources

                                              Zoho CRM Resources

                                                      Design. Discuss. Deliver.

                                                      Create visually engaging stories with Zoho Show.

                                                      Get Started Now