My question can be described as: "If user has enabled Digests(for instance daily), will he along with daily digest email letter also receive an email after someone else post reply on topic he is subscribed

If Yes then
"How to prevent user from receiving post reply notification with digests extensions enabled (in UCP also)?"
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Because i think if user enabled Digests in UCP, so there is no need to send him email on every post reply within his topics subscriptions since he enabled Digests
It turns out dubbing notifications i think.
Thanks a lot, if you can explain behaviour of extension along with phpbb core functionality
Kind regards