Email Reputation

When Inboxbooster tells you you have an email reputation problem, this means your IP or your sending domain has been flagged by a mail server for spamming. It was so bad that they decided that your future emails would be sent to spam.

There are only three causes:

• You were sending "bad" emails enough that the spam filter barred you from sending
• You are starting a new domain (or a new IP), and the "warm-up" phase wasn't done properly
• You are sharing part of your infrastructure with someone else who is guilty of sending unwanted emails

These causes are not exclusive, and sometimes they add up together.

What is a "Bad" Email

What we mean by "bad emails" are emails the spam filter thinks their users don't want. Spam filters analyze user behavior and optimize to remove unwanted emails. For instance, an unwanted email is an email you'll delete after skimming through it or one that simply goes unread.

Important points to note

• It's, of course, a gross simplification. Here's an example to explain the complexity of the problem: you might delete a payment receipt, but you still want it. A machine can only read that you don't like it, which sends a negative signal to spam filters regarding future emails from the same sender.
• Spam filters use various techniques to figure it out and "outplay" spammers. They're constantly evolving and improving.