and experiences an open rate that Sendgrid reports as being above 100% (people open it more than once?! probably). I'm surprised they report it that way. When

and experiences an open rate that Sendgrid reports as being above 100% (people open it more than once?! probably). I'm surprised they report it that way. When open rates are quoted online, it's more typical that they're based on unique opens to circulation. For example, if you have a list of 100,000 people and 50,000 open the email, that's a 50% open rate, even if they all open the email 10x (because 500% open rate makes no real sense). Trivial opt-out as I don't want to send to anyone not interested in it This is always a good idea. Some people who want to build a list balk at it, but would somehow prefer people who don't want their email to get "stuck" on their list(!)