SendGrid phishing emails are some of the best phishing emails. I get emails that there's elevated error rates on an API (`/v1/send`). Looks very legit, good design, reasonable call to action, some urgency which makes me want to click. They know from MX records I send email with Sendgrid, so it's well targeted. Easy catch when I see the domain, but other than that it's the best I've seen in years.
