How to Check If Your Domain Is Blacklisted

If your emails are being blocked or consistently going to spam, your domain or mail server's IP address may have been added to an email blacklist. Here's how to check and what to do about it.

How to Check for Blacklisting

1. Go to MXToolbox at mxtoolbox.com/blacklists.aspx.
2. Enter your domain name or your mail server's IP address.
3. Click Blacklist Check.
4. MXToolbox will check your domain against over 100 blacklists and show any matches.

Other tools include MultiRBL.valli.org and Spamhaus.org.

Common Reasons for Blacklisting

• Your email account was sending spam (possibly due to a compromised password)
• You sent bulk email without proper opt-in consent
• Your account exceeded server sending limits
• A misconfigured mail server

How to Request Removal

Each blacklist has its own removal process. Visit the blacklist's website directly and follow their delisting instructions. Most will ask you to confirm the spam issue has been resolved before removing you.

Preventing Future Blacklisting

• Use strong, unique passwords for all email accounts
• Set up SPF, DKIM, and DMARC
• Monitor outgoing email volumes
• Never send unsolicited email

If your dotCanada server IP is blacklisted, contact our support team for assistance.