I have a huge archive containing some giga of mail. Once, when I didn't have Gmail, I didn't filter them for spam, so now I have massive spam into it.
Is there a way to let Gmail (or some other application) process that folder for spam, and filter all what it finds for trashing?
Gmail – Reprocess mail archive for spam
emailgmailimapspam-prevention
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Best Answer
I'm quite sure this is currently not possible from within Gmail.
You can try to sync ALL your mail with f.e. Thunderbird or Outlook and look for a way to do the trick in that program, I don't know much of these so I don't know if it's possible with them.
But I'm sure Gmail can't.