Please ask the respondent to check their junk mail/spam folder first. As a user, you have the ability to resend the invitation to any respondent. There is also the ability to regenerate an invitation and copy it into your company email and then send it. You could also ask your IT department to whitelist the email address mri@marketculture.com so it does not get blocked by your network's firewall. Please watch the video below to resend an invitation.