Sieve filter 'variables' extension [RFC 5229]
The 'variables' extension described in RFC 5229 (https://tools.ietf.org/html/rfc5229) is key in unlocking even more of the potential of the Sieve mail filtering language.
13
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hjkl
shared this idea
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woa7 commented
I believe this is already implemented.
https://proton.me/support/sieve-advanced-custom-filters