> Complaint: A report that a recipient marked your email as spam, passed back to the sender by mailbox providers that offer a feedback loop.

Source: https://vaartix.com/glossary/complaint

[Email glossary](https://vaartix.com/glossary)

# Complaint

Also called: Spam complaint, feedback loop

A report that a recipient marked your email as spam, passed back to the sender by mailbox providers that offer a feedback loop.

## How this affects you

Complaints hurt your reputation more than anything else. In Vaartix a complaint suppresses the address for your team only (they complained about your email, not anyone else's), and a team whose complaint rate goes above 0.08% over 7 days is paused. Only email people who asked for it, and make it obvious who it's from.

## Learn more

-   [Suppression](https://vaartix.com/docs/concepts/suppression/)
-   [How to avoid spam](https://vaartix.com/docs/guides/avoid-spam/)

Related: [Suppression list](https://vaartix.com/glossary/suppression-list) · [Sender reputation](https://vaartix.com/glossary/sender-reputation) · [Transactional vs marketing email](https://vaartix.com/glossary/transactional-vs-marketing-email)

**Vaartix is a transactional email API built in India.** SPF, DKIM and a return path on your domain are set up for you, and every feature is free during the private beta.

[Request early access](https://vaartix.com/#early-access)