When did commercial ESPs appear?
Commercial Email Service Providers (ESPs) emerged in the mid to late 1990s. Pioneers like Constant Contact (1995) and AWeber (1998) led the way, with Mailchimp (2001) and ExactTarget (2000) following as part of the second wave that defined modern email marketing.
They were the first commercial shipyards of the email world, renting out ready made vessels, trained crews, and navigation tools to send messages across digital seas.
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