Do you have a MailChimp account? Now you can have contact imported directed to your MailChimp lists. Just connect your account, and create a widget for your website. Follow the simple steps below:
Go to Settings > Connections
Connect your account by filling in your login details
Once connected head to Promote > Widgets
Choose Newsletter widget
And you are connected! Once someone subscribes or leaves their email address with you, then you will have the e-mail automatically in your MailChimp list.