Spam complaint rate is the share of recipients who mark your email as spam. Google asks bulk senders to keep the user reported spam rate below 0.1% and never let it reach 0.3% or higher. Going above that level hurts inbox placement and limits help from Google.
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The share of recipients who mark your email as spam. Google asks bulk senders to stay under 0.3%, and ideally under 0.1%.
The rate is usually calculated as the number of spam reports divided by the number of messages delivered to the inbox over a period. Gmail reports it in Postmaster Tools for domains with enough volume, and Yahoo and Microsoft have their own feedback signals. Even small numbers matter: at 0.3%, just three complaints for every 1,000 delivered emails can cause problems.
Google's guidelines say that bulk senders above 0.3% are not eligible for mitigation, and mitigation becomes available again only after the rate stays below 0.3% for seven days in a row. Complaints often come from people who did not expect the email, cannot find an easy way to opt out or receive messages that feel irrelevant.
Why it matters to recruiters
Recruiters send outreach to people who did not ask for it, so complaint risk is real. A high complaint rate can push all your email, including interview invites and client updates, into spam. Keeping complaints low protects the whole team's ability to reach candidates and clients, and it is a useful signal that targeting and messaging are on track.
An example from a recruiting desk
A job alert goes to 8,000 of an agency's past candidates, many of whom applied years ago. Thirty people mark it as spam. Postmaster Tools shows the rate climbing toward the limit. The team limits future alerts to candidates active in the last 12 months, adds a clear unsubscribe line at the top and the rate drops back under 0.1%.
Tips that help
Send only to people likely to expect or welcome your message.
Make unsubscribing easier than clicking report spam.
Watch complaint rates after every large send and pause if they climb.
Remove contacts who have not engaged in a long time.
Mistakes to avoid
Mailing old candidate databases in bulk without checking recency or consent.
Hiding the unsubscribe option, which pushes annoyed readers to the spam button.
Frequently asked questions
How do I lower my spam complaint rate?
Email only people who expect to hear from you, such as recent applicants or contacts who clearly match your search. Remove stale records, make the unsubscribe link easy to find, honor opt outs quickly and keep sending frequency sensible. Clear subject lines and relevant content also mean fewer people reach for the spam button.
How is spam complaint rate calculated?
Divide the number of spam reports by the number of emails delivered to the inbox over the same period, then multiply by 100. Gmail calculates its version in Postmaster Tools based on delivered Gmail traffic.
Can I see who marked my email as spam?
Usually not for Gmail, which reports only aggregate rates. Some other providers send complaint feedback that your email platform uses to suppress the address automatically. Always remove complainers from future sends.
