If you are sure that the login details you have entered are correct, and your host simply does not allow Onpipeline to connect to your SMTP server, consider registering a new domain and activating a provider specializing in SMTP services, such as Sendlayer, SendGrid, Mailgun, Amazon SES, SMTP.com, SparkPost, etc. Setting up the same new domain as an alias on your IMAP server can capture replies.

Our engineers are available to guide you toward the best approach for your situation.