I am getting this error message that is preventing my email recipients from receiving my emails. The SMTP banner doesn't match the reverse DNS.
I have been searching for a solution on Google for this for hours and to no avail. Does anyone know where the SMTP banner is, how to access it and change it?
I have been searching for a solution on Google for this for hours and to no avail. Does anyone know where the SMTP banner is, how to access it and change it?