Complaint
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
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.