Mail's junk mail filter moves flagged messages from its Inbox to Junk mail. If a message does not reach the Inbox, then it won't be moved to Junk mail. Disable spam filtering in Gmail. Let the Mail Junk mail filter do its thing.
Mail's junk mail filter moves flagged messages from its Inbox to Junk mail. If a message does not reach the Inbox, then it won't be moved to Junk mail. Disable spam filtering in Gmail. Let the Mail Junk mail filter do its thing.