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Apps with 'SPF support' feature

  1. Free open source Zendesk & Help Scout alternative: help desk, shared mailbox, email management and analytics. FreeScout is a pure PHP7+MySQL application which can be easily deployed even on a shared hosting.
  2. Free email marketing software. Try a fresh new approach to email marketing, one that's fully-featured, flexible and most importantly free for life.
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    • Software as a Service (SaaS)
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    Flowmailer focusses on your inbox success. Easily connect all your source systems via SMTP or REST API and let Flowmailer deliver all your transactional emails. Sent via clean IP addresses, authenticated with SPF, DKIM, and DMARC to ensure your domain acquires a high reputation.