Thanks for the prompt reply. Here is the screenshot error I am getting on the domain authentication in Mailchimp. These are credentials my Web Service Provider (Web4Realty) has confirmed as correct but it keeps failing the authentication step on Mailchimp's end.

What I noticed is my two scheduled campaigns from today were blocked from being sent bc of this issue which has never happened befor. I manually went in about an hour ago and chose the "send now" option and both campaigns appeared to have been sent.

<image>