Free Email Spam Checker

Paste your email source to analyze it for spam triggers. We'll parse the headers and content to identify issues that could land your emails in the spam folder.

Paste the raw email source including headers. In most email clients, you can view this via "Show Original", "View Source", or "Show Raw Message".

Check blacklists and verify domain authentication (SPF, DKIM, DMARC) using the From address in the email.

How to Get Email Source

Gmail

  1. Open the email
  2. Click the three dots menu (top right of email)
  3. Select "Show original"
  4. Click "Copy to clipboard" or select all and copy

Outlook

  1. Open the email
  2. Click the three dots menu
  3. Select "View" > "View message source"
  4. Copy the entire content

Apple Mail

  1. Select the email
  2. Go to View menu > Message > Raw Source
  3. Or press Option + Command + U
  4. Copy the entire content

Understanding Spam Filters

Spam Trigger Words

Certain words and phrases are heavily associated with spam. Using them doesn't guarantee your email will be blocked, but it increases the risk.

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Email Headers

Email headers contain metadata that spam filters analyze. Missing or suspicious headers can trigger filters.

Message-ID
Unique identifier for the email
Reply-To
Should match From domain when possible
Date
Must be present and valid

Email Compliance

Laws like CAN-SPAM, GDPR, and CASL require certain elements in commercial emails.

Unsubscribe
Include a clear opt-out mechanism
Address
Include your physical postal address
Sender ID
Use accurate "From" information

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