Not necessarily (although, hard to imagine there's even 1 spammer willing to spend $100,000/yr on some enterprisey crap like Salesforce Pardot or Marketo).
But I'd just go with whatever sender isn't the cheapest and has the founders still intimately involved in the product. Stopping spammers is ultimately still a human game. Postmark used to be my go-to, but they sold, and I'd bet my entire salary that within a few years that service will end up like all the others that have been bought-and-sold.
But I'd just go with whatever sender isn't the cheapest and has the founders still intimately involved in the product. Stopping spammers is ultimately still a human game. Postmark used to be my go-to, but they sold, and I'd bet my entire salary that within a few years that service will end up like all the others that have been bought-and-sold.