Hello,
Since High Sierra (10.13.6) the spam filter I can't change the spam filter settings any more. I want to use the option "Mark as junk mail, but leave in my inbox”, but regardless of which option is selected, spam mails are still sent to the spam folder. Even the complete deactivation of the spam filter has no effect. Any ideas?
Best regards
i had similar problems.
is your email using POP or IMAP?
for me, the issue that fixed it was to set up my email account's "Email Behaviors" in Mail account's Preferences so that even for IMAP email is being always downloaded / stored on devices, and not always in IMAP server folders.
i was getting huge amounts of spam/junk in one of my accounts.
i wanted a simple way to get this spam/junk into ANY folder that could delete it with the least amount of keystrokes by me.
i was able to change my email account's Email Behaviors for that email account to storing locally, and this allowed the spam/junk to go automatically into my mac's local Junk folder, able to do a Select All and then delete all at once.
since you used the term "Spam" folder i assume you have an IMAP setup storing on the server.
this is why its always sending to the Spam folder.
i dont think that Mail's Junk rules are kicking in at all under that scenario.
but if you store locally, then i think there is a good chance that Mail's Junk rule to "Mark as junk mail, but leave in my inbox” would probably work for you.