Have you verified your domain with MailChimp?
Verifying an account with MailChimp lets you send your newsletters as if they’re coming from your domain.
Sending an email through MailChimp is awesome, but if you want to improve your branding and customer experience, take a moment to verify your domain to allow your email marketing to appear like they’re coming directly from your domain.
It’s a moderately complex task that involved modifying your CNAME and TXT records at your hosting company, or domain registrar depending on your setup. Here’s what MailChimp says about it – “Authenticate thisismyurl.com with MailChimp by modifying your domain’s DNS records. These changes allow your campaigns to appear to come from thisismyurl.com, instead of from our servers. After you’ve made the required DNS changes, please wait 24-48 hours for the changes to propagate.”