Using Qualtrics, a survey owner can create a workflow that triggers the sending of an email to a specified email address. On a rare occasion, a user may report that they used to get emails in this way, but they no longer do.
One possible reason for this is that the recipient's email address MAY have been added to the Qualtrics blocklist. Meaning, Qualtrics will try to send an email from the address noreply@qemailserver.com, but it will never leave Qualtrics and won't be traceable by the recipient's IT team.
To resolve this, a user can contact Qualtrics support and ask if the recipient's email address is on the blocklist. If it is, they can request that it be unblocked.