The fastest way to block unwanted email
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 message and choose "Block". In Apple Mail, click the sender's name at the top and select "Block Contact". The blocked sender's future emails go straight to spam or a blocked folder — you won't see them, and they won't trigger notifications.
Blocking works best when you know exactly who is sending the unwanted mail. If you're getting spam from a dozen different addresses, or if the sender keeps creating new accounts to get around your block, blocking alone won't solve the problem. That's when you need a second step.
Key Takeaways
- Blocking a sender takes seconds in Gmail, Outlook, or Apple Mail and sends their future emails directly to spam.
- Unsubscribe links in legitimate marketing emails actually work — use them instead of blocking if you want to stop hearing from a company you once signed up for.
- Spam filters improve when you mark unwanted mail as spam rather than just deleting it, teaching your email service what you don't want to see.
- If a sender keeps emailing you from new addresses after you block them, report the pattern to your email provider rather than blocking each new address individually.
- Never reply to spam, click links in suspicious emails, or confirm your address is real — these actions often make the problem worse.
The difference between blocking and marking as spam
Blocking stops one specific email address from reaching your inbox. Marking as spam does something different: it tells your email service "I don't want messages like this" and trains the filter to catch similar mail in the future. If you block someone but don't mark their email as spam, they've still taught your filter nothing.
Use marking as spam when you're getting unwanted mail from addresses you don't recognize or from bulk senders. Use blocking when you know the person or company and want to stop them specifically. Many people do both: mark the email as spam, then block the address. This stops that sender and helps your filter recognize similar messages.
Your email provider's spam filter gets smarter the more you mark things as spam. Gmail, Outlook, and Apple Mail all use machine learning to spot patterns in what you reject. If you delete unwanted mail without marking it as spam, you're missing a chance to improve your filter for everyone else using that service too.
When to use unsubscribe instead of blocking
If the email came from a company you recognize — a retailer, a news site, a service you signed up for — look for an unsubscribe link at the very bottom of the message. It's usually small text in gray. Click it, and you'll be removed from that mailing list. This is faster and cleaner than blocking because it actually stops the sender from mailing you, rather than just hiding their mail from your view.
Unsubscribe links are required by law in most countries for marketing email. They work. If you block instead of unsubscribing, the company's system doesn't know you want off the list, and they may keep trying to reach you from different email addresses or through different services they own.
The one exception: if you've already unsubscribed multiple times and the mail keeps coming, then block. That tells you the sender isn't respecting the unsubscribe request, and blocking is the right next step.
Dealing with spam that comes from many different addresses
Blocking works poorly when spam comes from dozens of addresses or when the sender creates new addresses to get around your block. In this case, look for a pattern in the email addresses themselves. Do they all end in the same domain, like @spamcompany.com? If so, you can often block the entire domain rather than individual addresses.
In Gmail, you can create a filter to automatically send all mail from a domain to spam. Go to Settings, then Filters and Blocked Addresses, then Create a New Filter. Type the domain (for example, @spamcompany.com) in the "From" field, and choose "Delete" or "Skip the Inbox" to send it straight to spam. Outlook and Apple Mail have similar features, though the steps differ slightly.
If the addresses don't follow a pattern, report the sender to your email provider. Gmail has a "Report phishing" option, Outlook has "Report junk", and Apple Mail has "Mark as Junk". When you report, include a few of the unwanted messages so the provider can see the pattern. They use these reports to improve spam filters for all users.
Protecting yourself from future spam
The best defense is not giving out your email address to places that will sell it. When you sign up for something online, read the privacy section. If it says your email may be shared with partners or used for marketing, that's a signal you might get spam later. Some services let you opt out of marketing email at signup — do that if the option appears.
Use a separate email address for online shopping, signups, and services you're not sure about. Keep your main email address for people and organizations you trust. This way, if one address gets sold to spammers, your primary inbox stays clean. Many email providers let you create multiple addresses for free or for a small fee.
Never reply to spam, click links in suspicious emails, or confirm your address by responding. These actions tell spammers your address is real and monitored, which makes you a more valuable target. If you're not sure whether an email is legitimate, go directly to the company's website instead of clicking any link in the message.
What to do if blocking isn't working
If you've blocked someone and they keep reaching you from new addresses, they may be spoofing — using a fake sender address that looks like it came from someone else. Check the actual email address in the message header, not just the display name. In Gmail, click the down arrow next to the sender's name and select "Show original" to see the real address. In Outlook, right-click the message and choose "Message Options" to see the full header.
If the real address is different from what's displayed, the sender is spoofing. Report this to your email provider as phishing or abuse, not just as spam. Spoofing is illegal in most places, and providers take these reports seriously. Include the full message header when you report so they can trace the real source.
If you're getting harassing email from someone you know, blocking is a first step, but you may also need to save the messages and report them to local police or your employer, depending on the situation. Email providers can help with patterns of harassment, but law enforcement may be necessary if the behavior escalates.
How email filters and rules can help long-term
Beyond blocking individual senders, you can set up rules that automatically sort or delete mail based on words, phrases, or sender patterns. In Gmail, these are called filters. In Outlook, they're called rules. In Apple Mail, they're called rules as well. These tools let you handle entire categories of unwanted mail without touching each message.
For example, if you keep getting emails with "work from home" or "make money fast" in the subject line, you can create a rule that sends anything with those phrases straight to spam. If you're getting mail from a specific company domain but only want certain types of messages, you can create a rule that keeps some and deletes others.
Rules take a few minutes to set up but save time over weeks and months. Start with the senders or phrases that bother you most, then add more rules as new patterns emerge. Review your spam folder occasionally to make sure legitimate mail isn't being caught by accident.
Frequently Asked Questions
Does blocking someone let them know I blocked them?
No. When you block a sender, they don't receive a notification. Their emails simply go to spam or a blocked folder on your end. They have no way of knowing you blocked them unless they try to email you and notice you never respond.
Can I unblock someone after I block them?
Yes. In Gmail, go to Settings, Filters and Blocked Addresses, and find the blocked address in the list. Click "Unblock" next to it. In Outlook, go to Settings, Mail, Junk Email, and find the blocked sender. In Apple Mail, go to Mail preferences, Junk Mail, and look for the blocked contact. You can unblock anytime.
What's the difference between spam and phishing email?
Spam is unwanted bulk mail, usually trying to sell you something or get you to click a link. Phishing is email designed to trick you into revealing passwords, financial information, or personal data by pretending to be from a bank, service, or person you trust. Report phishing to your email provider immediately — it's more serious than spam.
If I mark an email as spam, can the sender see that?
No. Marking an email as spam is private. The sender doesn't know you marked it as spam, and it doesn't affect their ability to email you again. Blocking is what stops them from reaching you; marking as spam just trains your filter.
Why do I still get email from someone I unsubscribed from?
Legitimate companies honor unsubscribe requests within a few days, but it can take up to 10 business days. If mail keeps coming after that, the sender may not be legitimate. Block the address and report it as spam. If it's a company you recognize, contact their customer service directly to complain about the unsubscribe failure.