1. Enable Spam Filtering Tools in cPanel
✅ Apache SpamAssassin
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Enable it in your cPanel under Spam Filters.
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Adjust the spam score threshold (start at 5; lower it to 3–4 for stricter filtering).
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Enable auto-delete or move spam to a separate folder for review.
✅ BoxTrapper (Email Verification)
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Activates a challenge-response system that blocks unverified senders.
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Only people who verify themselves (or are on your whitelist) can send you messages.
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Great for cutting off bots and non-human spammers.
✅ Email Filters
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Create custom rules for your inbox.
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Examples:
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Delete messages with subjects like “Congratulations, you’ve won!â€
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Route suspected spam to a custom folder.
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🚫 2. Use Whitelists and Blacklists
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Whitelist trusted senders so their messages are never flagged.
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Blacklist persistent spammers or whole domains (e.g., *@spamdomain.com).
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Do this inside BoxTrapper or directly via SpamAssassin’s configuration.
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 3. Protect Your Email Address Online
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Never post your email address in plain text on websites or forums.
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Use contact forms on your website instead of email links.
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Use email aliases (e.g.,
sales@yourdomain.com,support@yourdomain.com) and rotate or delete them if compromised.
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 4. Use SPF, DKIM, and DMARC Records
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These are email authentication tools that:
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Prove your emails are coming from trusted servers.
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Prevent spammers from spoofing your domain.
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Add or verify these settings in your cPanel > Email Deliverability.
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 5. Monitor and Clean Up Catch-All Addresses
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A catch-all email address receives all misaddressed emails.
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Disable catch-all if you’re receiving large volumes of spam to random addresses like
xyz@yourdomain.com.
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 6. Regularly Update and Review
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Check spam folders to avoid false positives.
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Adjust spam filters and whitelists monthly.
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If one email alias gets spammed, remove or replace it.
Also you may check these links for further information about spam:
How do spammers harvest email addresses
http://www.private.org.il/harvest.html
SPAM - Munging Your Email Address
http://members.aol.com/emailfaq/mungfaq.html
http://www.internet-tips.net/Email/SPAM_munging.htm
How To Deal With Spam
http://pobox.com/nospam.html
Korean Spam Filter
http://www.siue.edu/~jpogats/korea.html
SPAM Tips and help
http://spam.abuse.net/spam/userhelp/
SpamCop
http://spamcop.net/
SpamCop FAQ Parsing and reporting spam
http://spamcop.net/fom-serve/cache/16.html
A Quick Guide to E-Mail Headers
http://real.fissure.org/articles/headers.shtml
Reading Email Headers
http://www.stopspam.org/email/headers/headers.html
Dealing With Junk Email
http://www.jcrdesign.com/junkemaildeal.html
The SPAM-L FAQ
http://www.claws-and-paws.com/spam-l/index.html