We have purchased the Transactional-Email addon. I am trying to send a transactional email using the SMTP API.
I used the create SMTP token API given below to create a token.
Then using the userName and Password obtained from the above API, I am using an SMTPClient in my C# code to send the email. However, I get the following error:
Hubspot Mailbox unavailable. The server response was: 5.5.0 Unauthenticated senders not allowed J6r-SG1VW40mQgw8-vYSG0 - hssmtp
Given below is my C# Code snippet:
var smtp = new SmtpClient("smtp.hubapi.com", 587); smtp.DeliveryMethod = SmtpDeliveryMethod.Network; smtp.Credentials = new NetworkCredential(smtpUserName, smtpPassword); smtp.Send(mail);
Not sure if this could be a security issue in the sense, I am testing this from my local machine. Is there some whitelist of IpAddress or something like that?