A Very difficult product. If you don't use the account for 3 days, then they will close the account on the 4th day and ask you to create a new account. You need to have a lot of backup emails in order to use Sendgrid. Another big comedy is about their password rules. It has to be 16 letters. even my bank hasn't asked for such a ridiculous thing. Seems some engineer over there wanted to create some innovation and he just increased the password length. loose guys