five.X.X Everlasting Mistake: These mistake codes begin with the variety “five” and so are followed by two numbers. They normally signify the SMTP connection has dropped. If you try to resend the email, it's going to most likely however cause exactly the same error. I very propose Mailchimp in https://it-support89999.blogthisbiz.com/32521942/not-known-details-about-powermtasend-email