The fastest way to stop spam is to use your email provider's built-in filters
Every major email service — Gmail, Outlook, Yahoo Mail, Apple Mail — has a spam filter that runs automatically. You do not have to turn it on or configure anything. The filter watches incoming mail, learns from what you mark as spam, and gets better over time. Most spam never reaches your inbox; it goes straight to a spam or junk folder.
The real control comes from three actions you can take right now. First, mark unwanted mail as spam instead of just deleting it — this teaches the filter what you do not want. Second, unsubscribe from mailing lists you signed up for but no longer read. Third, use your email provider's blocking tools to stop mail from specific senders before it even gets filtered.
Key Takeaways
- Mark unwanted mail as spam, not delete, so your email provider learns your preferences and blocks similar messages in the future.
- Unsubscribe from legitimate mailing lists using the unsubscribe link at the bottom of the email — this stops mail you once chose to receive.
- Block specific senders directly in Gmail, Outlook, or Yahoo Mail so their mail never reaches you again.
- Never reply to spam, click unsubscribe on unknown senders, or confirm your email address works — these actions tell spammers your address is active.
- Use a separate email address for online shopping, signups, and forms to keep your main inbox cleaner.
How to mark mail as spam in your email provider
In Gmail, open the message and click the trash icon at the top, then select "Report spam" from the menu that appears. You can also right-click the sender's name in your inbox list and choose "Mark as spam" without opening the message.
In Outlook (Outlook.com or Outlook on the web), select the message and click the trash icon. A menu will ask if you want to delete it or mark it as junk. Choose "Junk" — this trains the filter and moves the message to your Junk folder.
In Yahoo Mail, click the message and select the trash icon, then choose "Mark as spam" from the dropdown. In Apple Mail on Mac or iPhone, swipe left on the message and tap the trash icon, then select "Mark as Junk."
The more you mark as spam, the better your filter learns. After a few weeks of marking, you will notice fewer unwanted messages reaching your inbox because the filter recognizes similar patterns.
How to block a specific sender permanently
Blocking stops all mail from one person or company. In Gmail, open a message from the sender you want to block. Click the three dots menu at the top right and select "Block [sender name]." Gmail will move all future mail from that address to spam automatically.
In Outlook, right-click the sender's name in your inbox and choose "Block." In Yahoo Mail, click the sender's name and select "Block." In Apple Mail, select the message, go to the Mail menu, and choose "Block Contact."
Blocking is permanent until you unblock the sender. Use it for mail you are certain you never want to see again — a blocked sender cannot reach you even if they use a different subject line or change their message.
How to unsubscribe from mailing lists you signed up for
Legitimate companies and newsletters include an unsubscribe link at the very bottom of every email, usually in small text. Click that link and confirm your choice. The sender has a legal obligation to remove you within ten business days in the United States.
Unsubscribe is different from marking as spam. Use unsubscribe for mail you once chose to receive but no longer want — newsletters, promotional emails, account notifications from services you use. Use spam for unsolicited mail from senders you never signed up with.
If you cannot find an unsubscribe link, the sender is likely a spammer, not a legitimate business. In that case, mark it as spam instead. Never reply to ask them to stop — that confirms your email address works and often leads to more spam.
What not to do when you receive spam
Do not click "reply" or respond to spam in any way. Spammers use these replies to confirm your address is active and monitored. A response, even a request to stop, tells them to send more.
Do not click links in spam emails, even to unsubscribe, unless you recognize the sender as a real company. Clicking a link in unknown mail can read malware, confirm your address, or take you to a fake website designed to steal your password.
Do not give your main email address to random websites, online forms, or untrusted services. Use a separate email address for shopping, signups, contests, and anything you are unsure about. If that address gets sold to spammers, your main inbox stays clean.
How to set up a separate email address for signups and shopping
Create a second email account with your provider — Gmail, Outlook, or Yahoo Mail all allow multiple free accounts. Use your main address only for people you know and services you trust. Use the second address for online shopping, newsletter signups, contest entries, and websites that ask for email but do not need to contact you urgently.
This separation keeps spam away from your primary inbox. If the secondary address gets flooded, you can ignore it, delete it, or create a new one without losing access to important mail. Many people find this simpler than managing filters.
Some email providers offer alias addresses — extra email addresses that forward to your main inbox. Gmail calls these "aliases," Outlook calls them "alternate email addresses." These work the same way: give the alias to untrusted sites and keep your real address private.
When to use filters instead of blocking or marking spam
Filters let you automatically sort, delete, or move mail based on words, sender, or subject line. Use filters when you want to keep mail from a sender but organize it separately, or when you want to automatically delete mail matching certain words.
In Gmail, open a message and click the three dots menu, then select "Create filter." You can filter by sender, subject, words in the body, or size. Choose what to do with matching mail: archive it, label it, mark it as read, or delete it.
In Outlook, go to Settings, then "Mail," then "Rules." Click "Add new rule" and set conditions (sender, subject, words) and actions (move to folder, delete, mark as junk). In Yahoo Mail, click the gear icon, select "More Settings," then "Filters" to create similar rules.
Filters are useful for newsletters you want to keep but not see in your main inbox, or for mail from a sender you trust but want organized separately. For unwanted mail, marking as spam or blocking is faster and more effective.
Frequently Asked Questions
Why does spam keep coming even after I mark it as spam?
Spammers often use a new sender address for each batch of mail, so your filter cannot recognize it as coming from the same source. Mark each new one as spam to train your filter. If you notice the same sender address repeatedly, block them instead — blocking is permanent, while spam marking only affects similar future mail.
Is it safe to click unsubscribe on emails I do not recognize?
No. Unsubscribe links in unknown mail can confirm your address is active or take you to a fake website. Only click unsubscribe on mail from companies you recognize and signed up with. For everything else, mark it as spam.
Can spammers see if I opened their email?
Some can. Spammers embed tiny invisible images in emails that notify them when you open the message. This confirms your address is active. Avoid opening spam if you can — mark it as spam directly from your inbox list without opening it. Most email providers also block these tracking images by default.
What if my email address was sold to spammers?
Mark unwanted mail as spam consistently, and your filter will improve over time. You can also create a new email address for important contacts and let the old one receive spam. Some people use email forwarding services that let you generate temporary addresses for signups, so spammers never get your real address.
Do I need third-party spam-blocking apps?
Your email provider's built-in filter is usually enough. Third-party apps add extra filtering but also access your email, which creates a privacy trade-off. If your provider's filter is not catching enough spam after a few weeks of marking, try adjusting your filter settings before adding a third-party tool.