In order to work with Digesto, your feed must meet standard RSS or Atom feed requirements.
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Specifications for standard RSS
​https://www.rssboard.org/rss-specification
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Specifications for standard Atom
​http://tools.ietf.org/html/rfc4287
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You can use this feed validator from W3 to run a diagnostic and it will return elements to review on your feed:
​https://validator.w3.org/feed/
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