The fastest way to block an unwanted sender

Most email services let you block a sender in one or two clicks. In Gmail, open the email, click the three dots in the top right, and select "Block [sender]." In Outlook, right-click the email and choose "Block." In Apple Mail, select the email and go to Mail > Junk > Add Sender to VIP or Block. The blocked sender's future emails go straight to spam or disappear entirely, depending on your settings.

Blocking works best for emails from a single address you recognize — a person, a company, or a service you no longer use. If you are getting spam from dozens of addresses or from addresses that change, blocking one at a time will not solve the problem. In those cases, you need filters or rules instead.

Key Takeaways

  • Blocking a sender takes seconds and sends their future emails to spam or removes them entirely, but only works for that one address.
  • Filters and rules catch emails by subject line, sender domain, or content keywords, so they work against multiple senders or changing addresses.
  • Unsubscribe links at the bottom of marketing emails remove you from legitimate mailing lists and often work faster than blocking.
  • Your email provider's spam settings let you adjust how aggressively it catches junk, and you can mark emails as spam to train the system.
  • Never reply to spam, click links in suspicious emails, or confirm your address — these actions tell spammers your email is active.

Using filters and rules to catch patterns of spam

If you are getting unwanted emails from multiple addresses or from addresses that keep changing, create a filter. Filters catch emails based on words in the subject line, sender address, sender domain, or message content — then automatically delete them, send them to spam, or move them to a folder you choose.

In Gmail, open an email from the unwanted sender, click the three dots, and select "Filter messages like these." You can then filter by sender address, sender domain (everything after the @ symbol), subject line, or words in the message body. Choose what happens to matching emails — delete, spam, or archive. In Outlook, right-click an email, select "Rules," and choose "Create Rule." In Apple Mail, go to Mail > Preferences > Rules and click "Add Rule." Each service works slightly differently, but all let you set conditions and actions.

Filters are especially useful for newsletters you no longer read, promotional emails from a company with many sender addresses, or emails with consistent keywords like "congratulations you won" or "claim your prize." Set the filter too broad and you might catch legitimate mail, so start with the sender address or domain, then widen the filter only if needed.

Unsubscribing from marketing emails

Most legitimate marketing emails — newsletters, promotional offers, account notifications — include an unsubscribe link at the very bottom. Clicking it removes you from that mailing list. This is faster and more reliable than blocking if the email is from a real company, because one unsubscribe stops all emails from that sender, not just one address.

Unsubscribe links are required by law in most countries for marketing emails. If you click the link and the emails continue, you can then block the sender or create a filter. Never reply to an unsubscribe request or click "unsubscribe" on an email you suspect is spam — that confirms your address is active and often leads to more spam.

Adjusting your email provider's spam settings

Gmail, Outlook, and Apple Mail all have built-in spam filters that catch many unwanted emails automatically. You can adjust how strict these filters are. In Gmail, go to Settings > Filters and Blocked Addresses to see your rules, or go to Settings > Labels to adjust how spam is handled. In Outlook, go to Settings > Mail > Junk Email to choose how aggressively the filter works. In Apple Mail, go to Preferences > Junk Mail to enable or disable junk filtering.

You can also train your email provider's spam filter by marking unwanted emails as spam or junk. Each time you do, the system learns what you consider unwanted and catches similar emails in the future. Over time, this makes the filter more accurate for your inbox. Check your spam folder occasionally to make sure legitimate emails are not being caught by mistake.

What to avoid when dealing with spam

Never reply to a spam email, even to ask to be removed. Replying confirms that your address is active and monitored, which makes you a more valuable target. Never click links in emails from senders you do not recognize, because clicking can confirm your address or install malware. Never provide personal information, passwords, or payment details in response to an unsolicited email, even if it claims to be from your bank or email provider.

Do not open attachments from unknown senders. If you are unsure whether an email is legitimate, go directly to the company's website or call their customer service number — do not use contact information from the email itself. Spammers often impersonate banks, payment services, and popular websites to trick you into revealing information.

Blocking emails on mobile devices

Most email apps on phones and tablets have a block option similar to the desktop version. In Gmail on iPhone or Android, swipe left on the email (iPhone) or long-press it (Android), then tap the trash or block icon. In Outlook mobile, swipe left on the email and tap the trash or block option. In Apple Mail on iPhone, swipe left on the email and tap the trash icon, then go to Settings > Mail > Blocked to see your blocked senders.

Mobile email apps may not let you create filters as easily as the desktop version. If you need to set up a complex filter, do it on a computer using your email provider's website, and it will explore to emails on your phone as well.

When to report spam instead of just blocking it

If you receive phishing emails (emails pretending to be from your bank, a payment service, or a government agency asking for personal information), report them to the real organization. Gmail, Outlook, and Apple Mail all have a "Report Phishing" or "Report Spam" option. Reporting helps the email provider and the organization being impersonated take action against the scammer.

If you are receiving a large volume of spam from a single source, reporting it to your email provider can help them block it for all users. You can also report spam to the Federal Trade Commission at reportfraud.ftc.gov if it involves a scam or impersonation.

Frequently Asked Questions

Does blocking someone stop them from seeing my emails?

No. Blocking only affects what you receive — it stops their emails from reaching your inbox. They can still send you emails; they just go to spam or disappear. If you want to prevent someone from contacting you at all, you may need to change your email address or use a different communication method.

Can I unblock someone after I block them?

Yes. In Gmail, go to Settings > Filters and Blocked Addresses and click "Unblock" next to the sender. In Outlook, go to Settings > Mail > Junk Email and find the blocked sender list. In Apple Mail, go to Preferences > Junk Mail and remove them from the blocked list. Their emails will then reach your inbox normally again.

What is the difference between blocking and marking as spam?

Blocking stops one sender's emails from reaching you. Marking as spam tells your email provider that a message is unwanted, which trains the spam filter to catch similar emails in the future. Marking as spam is useful for training the system; blocking is faster when you know exactly which sender you want to stop.

Will a filter catch emails that are already in my inbox?

No. Filters only explore to new emails arriving after you create the filter. If you want to clean up old emails, you can search for them by sender or keyword, select them all, and delete or move them manually.

Is it safe to click unsubscribe on emails I do not recognize?

Unsubscribe links on legitimate marketing emails are safe. But if the email looks suspicious — poor spelling, urgent language, asking for personal information — do not click the unsubscribe link. Block it or mark it as spam instead. Real companies use unsubscribe links; scammers rarely do.