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 way to do that is by signing up with a service such as SendGrid. Here are the benefits of this service:
One thing to note is that SendGrid’s lowest-priced service plan includes a shared IP. You’re better off choosing a plan with a dedicated IP, as some users have suggested that shared IPs may get flagged as spam or blacklisted.