Your bounce summary report can help you investigate delivery issues.

Sending to a spam trap damages your sender reputation, resulting in delivery issues. ISPs and blocklist providers use spam traps to identify spammers, so they can block emails from them.

A sudden spike in signups, spam complaints or unsubscribes, or a drop in open rates, could be signs of a spambot attack.

How spam complaints are made, how they affect your deliverability, and what you can do to avoid them.

High bounce rates negatively affect your sender reputation, and can land our sending IPs on blocklists which results in delivery issues for everyone.

Solve delivery issues by looking at your bounce reasons, for example mail block - general versus spam detected. Some bounces may be caused by a temporary blocklisting.