Treat club email addresses as member addresses

My club uses Mailchimp for managing our newletter and agenda. It uses the contact@azparkcentral.com email as the senders (from) address. For groups with more than one member, these emails are blocked. 
I understand that custom groups with multiple members can only receive emails from member addresses, but I don't get why club emails (president, secretary, treasurer, etc) are not treated as member addresses in this respect. 
 

If our server doesn't send the email you can not use it in the FROM. These are anti spam rules, we don't make them.