What do you do if spam complaints spike?
Stop sending to that segment immediately and find what changed — usually a list bought or imported, a long-dormant list emailed all at once, or follow-up with no defined stopping point. Complaints damage the deliverability of everything you send afterwards, including mail to customers who wanted it.
How fast you have to act
Gmail and Outlook start throttling within 48 hours of a complaint spike. By day five, your sender reputation is meaningfully damaged. Recovery is possible but takes 30-60 days of careful sending. The clock matters.
The three causes, in priority
- You sent to a stale list — segment that has not engaged in 12+ months produces 10x normal complaint rates
- Subject line over-promised — readers feel misled and report instead of unsubscribing
- A purchased or scraped list got merged in — never recoverable without removing the bad list entirely
The recovery plan
Day 1: stop all sending immediately. Do not send 'we are sorry' — that compounds the damage.
Day 2: identify the cause. Which segment did the spam complaints come from? The platform reports this; if yours does not, that is a platform problem.
Day 3: remove every unengaged contact (no open in 90 days) and every contact from any list whose source is unclear.
Week 2-8: ramp up volume by 20% per week, staying under your previous send size until reputation recovers.
How to prevent recurrence
- Quarterly list hygiene — automatic suppression of unengaged-90-days contacts
- Re-engagement sequence before any list goes 'cold' (no send in 90 days)
- Subject-line review on every send to a list over 5,000
- Never merge a third-party list into the primary one
What BayouEdge does
We run the diagnostic, write the recovery plan, and manage the careful re-ramp. Most Houston small businesses we work with recover to normal sending volumes inside 60 days.
What to do next
Call James at 832-338-2926. If you are in the middle of a spike, do not wait — every day of bad sending makes recovery harder.
Frequently asked questions
What is a normal spam-complaint rate?
Under 0.1% (one complaint per 1,000 sends) is healthy. Over 0.3% triggers Gmail throttling. Over 0.5% can suspend the account.
Should I send an apology email?
No. Apologies make it worse — readers who did not complain see the apology, treat it as more unwanted email, and complain. Silence is the right move during recovery.
How do I know the cause?
Your email platform reports complaints by send. Cross-reference: which campaign, which segment, which day. Mailchimp, Klaviyo, and HubSpot all show this in the reports.
Can a single bad send tank deliverability long-term?
Yes if it triggers a Gmail or Outlook block. We have seen six-month recovery cycles from a single 'big push' send to a stale list. Prevention is much cheaper than recovery.