An email address itself doesn’t end up on a blacklist directly — what actually gets listed is the IP address of your sending server and the sending domain behind the « @ ». Those are the two values you need to check regularly.
Step 1: Find your IP and domain
Look in your provider’s sending settings (Mailpro shows you the assigned IP) or send a test email to yourself and inspect the Received: from headers.
Step 2: Run a check using free online tools
| Tool | What it shows |
|---|---|
| MXToolbox Blacklist Check | 100+ DNSBLs, IP and domain lookups |
| MultiRBL.valli.org | Wide DNSBL coverage with detail pages |
| Spamhaus Lookup | Official SBL/XBL/PBL query from Spamhaus |
| Talos Intelligence | Reputation and traffic patterns per IP/domain |
| Google Postmaster Tools | User-side perception at Gmail recipients |
Step 3: Interpret the result
A listing on a major, trusted list (Spamhaus, Spamcop) is much more serious than one on a small niche list. Always read the listing reason on each blacklist’s page before taking action.
Step 4: Set up ongoing monitoring
One-off checks aren’t enough. Enable automatic blacklist monitoring so you’re warned the moment your IP or domain ever gets listed again.
Check your sender on a regular schedule
Learn how ongoing blacklist monitoring works, what causes a listing and how long delisting takes.