SMTP API - Error when email address contains international characters
I'm using the SMTP API with a .Net SMTP client sending to smtp.hubapi.com. I'm setting the delivery format to international, and the TO address encoding to UTF8. It looks like this works for some people as posted here
"The client or server is only configured for E-mail addresses with ASCII local-parts". Does the HubSpot server support international characters like "ä", or is it a matter of both the sending and receiving SMTP server?