I think the responder misread your message and assumed you were adding a suffix like \+\w+ to the end of your email addresses like name@gmail.com -> name+suffix

I think the responder misread your message and assumed you were adding a suffix like \+\w+ to the end of your email addresses like name@gmail.com -> name+suffix@gmail.com Several email providers treat a + symbol as the end of the first part of the address and ignore everything between it and the @. I think the responder’s point was that analytics providers just ignore things after a + too