Was MailChimp “Blocked” or “Blacklisted”?
Sometimes, corporate spam filters and email firewalls don’t like seeing a big group of the exact same emails being sent to multiple recipients inside a company. It looks like spam. Or maybe it’s used to seeing you sending one or two personal emails to a client in the company, but when it sees an email campaign come from the MailChimp server purporting to be “from:” you, it thinks it’s an imposter. Whatever the case, sometimes corporate email firewalls can be really strict. They’ll block or “blacklist” an email server for all kinds of reasons. Sometimes, the block is temporary. Like if they just feel that too much email is coming from one server too fast. Sometimes, the block is permanent, and the only way to get around them is to kindly ask the IT group in charge to “white list” MailChimp. Here’s our list of IP addresses and servers we send from. Is a major ISP blocking your emails? If a major ISP (like AOL, or MSN/Hotmail, or Yahoo! or SpamCop) is blocking your emails, this is actuall
