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.