Help ensure your emails
hit the inbox
Stop guessing why your messages end up in spam. Follow this 26-point checklist to achieve technical compliance, enhanced sender reputation, and delivery success.
SPAM Complaints
If a spam complaint is received, you should immediately cease sending any further messages to the affected recipient. Investigate the cause of the complaint and, if it appears to be a misunderstanding, you may reach out through another verified communication channel (such as phone or direct account contact) to clarify and confirm their preferences.
Always treat complaints seriously — continuing to send after one can escalate complaint rates, harm sender reputation, and result in blocking or blacklisting by ISPs and mailbox providers. Regularly monitor your feedback loops and unsubscribe data to identify potential issues early.
Aim to maintain a complaint rate below 0.1% (no more than one complaint per 1,000 emails sent). Consistently staying under this threshold helps preserve deliverability and ensures compliance with industry standards.