Receiving these complaints can tell you a lot about the health of your sending program. It is also one of the key data metrics that ISPs, i.e. email clients (Gmail, Hotmail, Yahoo, among others) look at when determining how to treat your mail.
The vast majority of these email clients apply Machine Learning algorithms or other operations to determine whether your email campaigns are properly and adequately received . That is, if many of their email recipients send your emails to the trash without even opening them, this will also generate, although not as such a deliberate and literal spam complaint by their users, that these ISPs can send your emails to the trash directly or mark them as spam.
In any case, it is best to focus on spam complaints from users who receive emails or Feedback Loop (FBL). This guide will try to determine what they are, how they are received and what to do with them.
TABLE OF CONTENTS
What is a spam complaint or Feedback Loop?
How are these complaints received?
Why do ISPs share this information?
What should you do with spam micronesia email list complaints once they have been received by your recipients?
1.- Make sure to remove from your list the subscribers who have complained
2.- Look at the trends in spam complaints and Feedback Loop received on your emails.
What is a spam complaint or Feedback Loop?
A spam complaint is registered when a user clicks the “this is spam” button in the email client when they receive an email that they consider irrelevant or invasive.

ISPs and email clients track the number of people who have complained about emails relative to the amount of email sent to them, which is called the complaint rate or Feedback Loop (FBL). As you might imagine, the lower the complaint rate, the better.
To summarize, the traditional definition of FBL is a mechanism by which an Internet Service Provider (ISP) reports user complaints based on when a user clicks the Spam or Junk button when they receive an email in their inbox.
In this regard, what is an acceptable spam complaint rate? A complaint rate of 0.2% or less is considered good , as it indicates that most of the emails sent are of interest to the contact list.