The fastest way to stop junk email

The simplest method is to mark the message as spam or junk in your email program, then unsubscribe from the sender's mailing list if an unsubscribe link appears at the bottom of the email. Most email services — Gmail, Outlook, Yahoo Mail — automatically learn from what you mark as spam and filter similar messages in the future. This works for legitimate marketing emails that you no longer want.

For truly unwanted senders, blocking is stronger than spam filtering. When you block an address, that sender's emails go straight to a folder you never see, and the sender gets no delivery confirmation. The exact steps differ by email service, but the option usually lives in a menu next to the sender's name or in your settings under "Blocked senders" or "Block list".

Start with marking as spam first. Blocking is useful when spam filtering isn't catching something, or when you want to be absolutely certain a specific person cannot reach you.

Key Takeaways

  • Mark unwanted emails as spam or junk to train your email service to filter similar messages automatically.
  • Look for an unsubscribe link at the bottom of marketing emails and use it to remove yourself from legitimate mailing lists.
  • Block specific senders when spam filtering alone is not stopping them, which sends their emails to a hidden folder.
  • Never reply to spam or click links in suspicious emails, as this confirms your address is active and often makes the problem worse.
  • Use filters or rules to automatically sort emails from certain senders into folders before you see them.

How to block a sender in Gmail

Open the email from the sender you want to block. Click the three-dot menu icon in the top right of the message. Select "Block [sender's name]" from the dropdown menu. Gmail will move that sender's future emails to spam automatically, and you will not see a notification when they arrive.

To see your full block list in Gmail, go to Settings (the gear icon in the top right), then click "See all settings". Go to the "Filters and Blocked Addresses" tab. You will see every address you have blocked. You can unblock someone from this list if you change your mind.

How to block a sender in Outlook or Outlook.com

Open the email from the sender you want to block. Click the three-dot menu icon at the top right of the message. Select "Block" from the menu. Outlook will move that sender's emails to your Junk folder and will not show you notifications.

To manage your blocked list in Outlook.com, click the gear icon in the top right, then "View all Outlook settings". Go to "Mail" and then "Junk email". You will see a section called "Blocked senders" where you can add addresses manually or see everyone you have already blocked. You can remove someone from this list anytime.

How to block a sender in Yahoo Mail

Open the email from the sender you want to block. Click the three-dot menu icon. Select "Block sender" from the options. Yahoo will send future emails from that address to spam, and you will not receive alerts.

To view or change your blocked senders list in Yahoo Mail, click the gear icon in the top right corner, then select "Settings". Go to "Security and privacy" and look for "Blocked addresses". You can add new addresses here or remove old ones.

When to unsubscribe instead of blocking

If the email is from a real company — a store where you shop, a newsletter you once signed up for, a service you use — look for an unsubscribe link at the very bottom of the email. This link is required by law for marketing emails. Clicking it removes you from that sender's mailing list entirely, which is cleaner than blocking because the sender knows you do not want their emails anymore.

Unsubscribing works best for emails you recognize as legitimate but no longer want. Blocking works better for unknown senders, obvious scams, or people who keep emailing you after you have already asked them to stop. Never unsubscribe from an email you think is a scam — that confirms your address is real and active, which often leads to more spam.

Using filters to sort emails before you see them

Filters (called "rules" in Outlook) let you automatically move emails from certain senders into a folder without blocking them completely. This is useful when you want to keep emails from someone but do not want them cluttering your inbox. You might filter emails from a mailing list into a folder you check once a week, for example.

In Gmail, go to Settings, then "Filters and Blocked Addresses", then "Create a new filter". Type the sender's address or a keyword in the "From" field. Click "Create filter". Choose "Skip the inbox" to send those emails straight to a label, or "Delete it" to send them to trash automatically. In Outlook, the process is similar: go to Settings, then "Mail", then "Rules", then "Create rule".

Filters are gentler than blocking because the emails still arrive — they just do not interrupt you. Use them for newsletters or notifications you want to keep but read on your own schedule.

What not to do with spam

Do not reply to spam emails, even to ask them to stop. A reply confirms that your address is active and monitored by a real person, which makes you a more valuable target. Spammers often sell lists of "confirmed active addresses" to other spammers, and one reply can multiply your problem.

Do not click links in emails you do not recognize, even if the link says "unsubscribe" or "click here to remove yourself". Clicking confirms your address is active and may read malware or take you to a fake website designed to steal your information. The only safe unsubscribe links are in emails from companies you recognize and trust.

Do not open attachments from unknown senders. If you are not expecting a file from someone, do not read it. Mark the email as spam instead.

Frequently Asked Questions

Can I block multiple emails from the same person at once?

No — you block one address at a time in most email services. If someone is emailing you from many different addresses, mark each one as spam as it arrives. Your email service will eventually recognize the pattern and filter similar addresses automatically. If the problem is severe, contact your email provider's support team.

What happens to emails after I block someone?

Blocked emails go to your spam or junk folder, where they stay for 30 days before deleting automatically in most services. You can check your spam folder if you are worried you blocked someone by mistake, but you will not see notifications when blocked emails arrive.

If I block someone, can they tell I blocked them?

No. When you block someone, their emails straightforward do not deliver — they get no bounce-back message or notification that you blocked them. From their perspective, the email disappeared into the void.

Should I block or report spam?

Do both. Mark the email as spam first — this trains your email service's filters. Then block the sender if spam filtering alone is not stopping them. Reporting spam helps your email provider improve its filters for everyone.

Can I block an entire domain instead of just one address?

Most email services do not offer domain-level blocking in their standard settings, but you can create a filter that catches emails from anyone at that domain. In Gmail, create a filter with "from:@domain.com" in the From field, then choose to delete or skip the inbox. This catches all addresses from that domain without blocking each one individually.