We use Trello free version. When a person leaves the team, I delete them from a board and send the copy link to join Trello to the new person to join that board. The new member clicks the link to Trello which says they have sent an email of verification to the participant; however, the new member does not receive the verification email. We have checked all folders, we have waited days, we have tried multiple times. We have confirmed the correct spelling of the address, etc. Our tech team has removed all protocols etc., and yet, the email does not come. What is the secret to the new person being able to join the board? Am I doing something wrong on their set up which is keeping their email from going through?