Mail Filters & SPAM

BoxTrapper, SpamAssassin, and mail filters to prevent spam.

How to Check Your Email's Spam Score Before Sending Important Messages

Learn how to test whether your outgoing emails are likely to land in spam folders, and what to fix if your spam score comes back low.

What Is Greylisting and Why Are Your Emails Delayed?

Greylisting is a common anti-spam technique that temporarily rejects an email the first time it is sent, causing a short delay before it arrives. Here is how it works and what to do if a message seems stuck.

How to Get Your Email IP Removed From a Spam Blacklist

If your outgoing emails are bouncing or landing in recipients' spam folders, your mail server's IP address may have been added to a blacklist. Here's how to confirm it, fix the cause, and request delisting.

Why Is Your Email Account Sending Spam? How to Detect and Stop a Compromised Account

If your email account is sending spam without your knowledge, it has likely been compromised. This guide covers the warning signs and how to lock the account down quickly.

How to Check If Your Domain or Email IP Is Blacklisted

Learn how to check whether your domain or hosting IP has been flagged on an email blacklist, what usually causes it, and how to get delisted.

How to Whitelist an Email Sender So Their Messages Stop Going to Spam

Learn how to whitelist a trusted sender's email address in cPanel or DirectAdmin so their messages are always delivered to your inbox instead of your spam folder.

How to Set Up BoxTrapper to Block Spam

Use BoxTrapper in cPanel to challenge unknown senders before their mail reaches your inbox.

How to Enable SpamAssassin and Adjust Its Sensitivity

Turn on SpamAssassin and tune how aggressively it flags incoming mail as spam, in cPanel or DirectAdmin.

How to Create a Mail Filter to Block or Sort Messages

Create a rule-based mail filter to block specific senders, sort messages, or act on mail flagged as spam.