Short answer
Use a public blocklist checker against your domain and your sending IP address. Being listed usually follows a compromised account or a form being abused to send spam — fix the cause first, because delisting without it just gets you relisted.
Learn more
- Email blacklists (blocklists): how to check and what to doWhat email blocklists are, how to check your domain and sending IP, why a shared server can be listed, and how delisting works.
- Why are my emails going to spam?The real reasons email lands in junk folders — authentication, content, reputation and recipient behaviour — and a checklist to fix each one.
- My email account is sending spamSigns a mailbox has been compromised, how to secure it, check for rules and forwarders an attacker added, and recover your sending reputation.
Step-by-step
- Diagnose email delivery problemsAdvanced · 40 min · 9 steps
All email deliverability questions · All questions and answers