Gmail auto label
Gmail auto label emails from unknown senders.
KeepKnown labels non-contact senders automatically without reading email body text or deleting messages.
Gmail filters can auto label email by sender, keyword, subject, attachment, and category. They do not include one simple rule for every sender who is not in contacts. KeepKnown adds contact-based auto labeling: known people stay visible, and outsiders move to a recoverable KK:OUTSIDERS label.
Short answer
Gmail can auto label known patterns, not every non-contact sender.
Use Gmail filters for predictable senders, receipts, newsletters, and words. Use KeepKnown when the rule depends on whether the sender is already in Google Contacts.
Two labeling jobs, one cleaner inbox.
Native Gmail labels
Good for exact rules: sender, subject, keyword, attachment, and category matches.
Contact-based labels
KeepKnown checks whether the sender is in Google Contacts before routing the message.
Recoverable screening
Outsiders move to KK:OUTSIDERS, not the trash. Add a sender to contacts when they should pass.
Setup path for contact-based auto labels.
Label predictable email
Keep Gmail labels for receipts, newsletters, notifications, and known sender rules.
Screen non-contact senders
KeepKnown applies the contact-based label Gmail rules cannot express directly.
Review only when needed
The outsider label is a review area for unfamiliar senders, not a destructive block.
Questions before you connect.
Can Gmail auto label emails?
Yes. Gmail filters can apply labels when messages match sender, recipient, subject, keyword, attachment, or category rules.
Can Gmail auto label emails from people not in contacts?
Not natively as a contact-list rule. KeepKnown compares senders with Google Contacts and labels outsiders.
Does KeepKnown read email bodies to label email?
No. KeepKnown checks sender metadata and contact membership. It does not inspect message body text.
What happens to labeled outsiders?
They move to the KK:OUTSIDERS label and stay recoverable. Nothing is deleted.
Related inbox workflows
Gmail label audit
Count the senders Gmail should label as outsiders.