For the error that we display in the conversation, we will fetch the error we got from the SMTP provider and display it. If you are sending from the SMTP integrated email already, please open a support ticket with the SMTP provider so they can provide the delivery status on the email.




Setting alias for Google Gsuite SMTP:

https://help.gohighlevel.com/support/solutions/articles/48001184605-setting-alias-for-google-smtp



For SendGrid:


https://docs.sendgrid.com/ui/sending-email/senders



For Zoho:


https://help.gohighlevel.com/support/solutions/articles/48001173743-using-zoho-as-your-smtp-provider