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  2. Technical documentation
  3. Technical insights

Technical insights

Learn more about things like e-mail filters, spam folders, quarantine, delivery logic, and other technical factors that affect how your communication performs.

  • Bounces - Causes and solutions
  • What is CSP (Content security policy)?
  • Accessibility: A part of great communication
  • Why does my e-mail end up in the spam folder?
  • What are e-mail filters and quarantine?
  • Which file formats are supported?
  • SPF, DKIM and DMARC - Requirement for using a custom sender address
  • E-mail authentication
  • Name your files
  • System requirements and prerequisites
  • Whitelist Ungappeds IP addresses and domains
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