How do I permanently block a sender in Gmail?

Last reviewed: September 21, 2026 · Markdown version

Blocking sends that sender's future mail to Spam — it does not delete what they have already sent, and it does not take you off their list. Gmail's help states the effect directly: "When you block a sender, even when you remove their emails from Spam, Gmail still automatically identifies their emails as spam."

What blocking does and does not do

Does: route future messages from that address away from your inbox, permanently, until you unblock.
Does not: remove the years of mail already sitting in your account, or the storage it occupies. That is a separate job — clearing one sender's history.
Does not: unsubscribe you. The sender keeps sending; you simply stop seeing it. For a legitimate mailing list that is the wrong tool — Google's guidance is to "click Unsubscribe or Go to website" instead.

The limit nobody mentions: blocking is per address

Marketing mail rarely comes from one address. A single retailer may send from news@, offers@ and noreply-12345@ across a year, and a block on one of them does nothing about the other two. This is why blocking feels like it "doesn't work" on exactly the senders people most want gone: it works perfectly, on an address that has already been replaced.

For that pattern, the durable fixes are unsubscribing (which ends the relationship, not one address) or a rule that acts on the whole domain.

Block, filter, or unsubscribe — choosing quickly

Unsubscribe when you once signed up and the sender is real.
Block when a specific human or address should never reach you again.
Filter to Trash when the mail is harmless but endless — order updates, alerts, automated reports — and you want it gone without ever seeing it.
Report as spam only for mail you never asked for. Reporting a real newsletter teaches the filter the wrong lesson and leaves the subscription running.

Where we fit

The third option is the one Gmail makes tedious and it is the one that scales. Adinand Email Cleaner groups your Gmail by sender, so you can see who actually keeps arriving, clear their backlog in a few taps, and set an auto-trash rule so future mail from them never reaches the inbox again — three rules on the free tier, unlimited on Pro. It reads only email headers, on your device, and it shows the measured space each cleanup gives back.

Sources: Gmail help: block or unsubscribe from emails, read 20 September 2026.