Is it possible to send emails created in Marketing Cloud Content Builder through the API? I don't mind whether it is SOAP or REST.

I'd like the data source to be a filter on a Data Extension.

  • is it marketing cloud? Commented May 19, 2018 at 10:43
  • Yes its marketing cloud Commented May 19, 2018 at 10:50
  • If the source is a filtered data extension you could just use journey builder or automation studio rather than an API to send the email. Commented May 20, 2018 at 22:58
  • Unfortunately the requirement is for it to be fully automated. Commented May 21, 2018 at 8:30

1 Answer 1


When defining the ETEmail in the ETEmailSendDefinition you have to specify the 'CustomerKey' and not the ID.

It appears that if you want to send a 'Classic' email the ID works, however if you're trying to send a 'Content Builder' email you need to specify the 'CustomerKey'.

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