Next4Spam Analysis

Email Inspector analyzes the technical attributes of a message that can impact deliverability. Specific tests include:

• Reverse DNS Entry
  Tests for a valid reverse DNS Entry - a requirement of many Spam filters.
  
• Valid From Field
  Tests for a properly formatted “From Field.” Malformed “From Fields” can cause dramatically higher bounce rates.
  
• Unsubscribe Mechanism
  Scans message for an unsubscribe mechanism, which, depending on the nature of the message, may be a requirement of CAN-SPAM.
  
• Attachments
  Identifies the existence of an attachment, which can cause a message to be filtered as SPAM.
  
• Physical Address
  Scans message for a sender’s physical address, depending on the nature of the message, may be a requirement of CAN-SPAM.
  
• Multi-part Message
  Detects whether message is an HTML/text “multi-part message”.
  
• Mime Boundaries
  Analyzes message for properly formatted Mime Boundaries.
  
• SPF Record
  Tests for the presence of an SPF record, an industry-accepted method of authenticating the email sender.