Closed hostingnuggets closed 6 years ago
What hostnames should be whitelisted?
IIRC that would be .mandrillapp.com and .mcsv.net
here are two examples:
mail128-33.atl41.mandrillapp.com
mail50.us4.mcsv.net
The networks they use to send out mails are listed here: https://mailchimp.com/about/ips/
mandrillapp.com should probably also be by default on the whitelist_clients as it uses tons of different servers and the mails get delayed for much longer than they should...