We got DDoSed by Microsoft once, since the marketing department sent out an email with a link to one of our low traffic services which generally handles maybe a

We got DDoSed by Microsoft once, since the marketing department sent out an email with a link to one of our low traffic services which generally handles maybe a few hundred requests a day, and tens of thousands of requests from Microsoft's email crawlers came in a very short time span and rendered our service unusable.