By default, the transaction emails that ProductDyno sends (such as the “welcome” email) are sent from a ProductDyno address. However, you have the complete flexibility to have them appear to come from your own email server or provider.
One of those options is MailJet.
MailJet offers both marketing email services and transactional email services.
One downside of working with MailJet is that they currently don’t offer live support via chat or telephone for the lower levels of service. However, they do have extensive documentation available, and their support team is responsive via email.