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  1. Hornetsecurity KnowledgeBase
  2. Spam and Malware Protection

Spam and Malware Protection

FAQ

  • Why an email has been blocked or quarantined?
  • Why are emails marked as spam despite being on the Allow List?
  • What does the error "This action is not allowed for this email type" mean?
  • Not possible to connect to smarthost for outgoing emails
  • Why are outgoing emails with the error code 554 5.7.1 rejected?
  • I am waiting for an email that had been sent to me, but I didn’t receive it yet. Was it blocked?
See all 14 articles

Pro Tips

  • Reporting False Positives and False Negatives
  • How to suspend (pause) email delivery
  • Untitled
  • Understanding message headers
  • Setting up the Outlook Add-In
  • Using RegExp and collective terms
See all 16 articles
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