A email delivery service isn't able to send those, and it considers that it isn't worth posting on their status page!
Are these messages really from SendGrid support? Looks like a desperate bid to prevent any future takeover attempts.
Haha that's a great idea for a "dirty tricks" campaign against a competitor. Every time they have an outage, a greenbean HN user starts posting less and less plausible excuses with the aim of pissing everyone off. Eventually the real CEO has to get on and say, "We don't know who this is but please ignore them but no I don't want to say anything about our outage." Repeat for added lulz...
Overall, I think Sendgrid does a fine job and it's unlikely this mistake will be repeated. These gaffes don't represent the majority of the company.
Maybe a disgruntled support person then.
If using yourselves is going to result in problems like this then I fail to see what we'd be paying for.