How do I check my email deliverability health?

Updated Nov 2, 2026

The Feedback Loop page summarizes the last 30 days of your bounces, complaints, unsubscribes and blocks.

What it shows

Sender deliverability health: Healthy, Watch, Warning or Critical, calculated by MailRush from your own sends. It is a guide, not a score from Gmail, Outlook or a blocklist, and it does not stop sending by itself.
Rates: bounce, complaint and unsubscribe rates.
What to do now: the most urgent actions.
Blocked & rejecting domains and Sending restrictions.
Senders: each sender's results and next step; Complaints; and the 30-day trend.

Bounces and complaints are counted only when their reports reach a mailbox MailRush reads.
Many providers, including Gmail, do not send per-message complaint reports.
Inbox placement of campaign emails is not measured.

The FAQ is in the MailRush.io app under Support (sign-in required).

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