Here's a random question that we were asked "We just got an email with an unsubscribe link going to kmail-lists.com; who is behind kmail-lists?" It turns out that it's pretty hard for at least the average person to figure out who is responsible for the kmail-lists.com domain; the ESP behind kmail-lists.com is Klaviyo, who is an ESP for primarily B2C businesses, in fact they are a primary competitor to Shopify, who used to dominate the B2C ('business to consumer') and D2C 'direct to consumer') ESP space.
