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I am trying to create a filter within Proton Mail, that adds a label 'mailing list' whenever Proton marks an email as from a mailing list.
It doesn't seem so easily possible as far as i can tell and I don't have the time (or will at the moment) to try and create it with a Sieve filter.
Is there an easy way to do this?
Often such emails have a "List-Unsubscribe" header entry, thus you could check on that.
if allof(
exists "List-Unsubscribe"
) {
fileinto "mailing list";
}
This worked as expected! Thank you very much!
You are welcome!