How to block an email sender in the most common services

The fastest way to block unwanted emails depends on which service you use. In Gmail, open the message, click the three dots in the top right, and select "Block [sender]". In Outlook (both web and desktop), right-click the message and choose "Block" or "Junk > Block Sender". In Apple Mail, select the message and go to Mail > Junk Mail > Add Sender to VIP or Block. Most services move blocked senders' future messages to spam automatically, though you can usually still see them if you check your spam folder.

The block takes effect immediately for new messages. Old messages from that sender stay in your inbox unless you delete them yourself — blocking does not retroactively remove past emails. If you block someone by mistake, you can unblock them the same way: find the block list in your settings and remove the address.

Key Takeaways

  • Most email services let you block a sender in two or three clicks from the message itself, without opening settings.
  • Blocking sends future emails to spam, but does not delete messages already in your inbox.
  • You can unblock a sender at any time through your email settings or block list.
  • For bulk senders and newsletters, unsubscribing is often faster than blocking if an unsubscribe link exists.
  • Blocking individual addresses does not stop similar spam from other addresses — filters and rules catch patterns instead.

Blocking vs. unsubscribing: which to use

If the email is a newsletter or marketing message with an unsubscribe link at the bottom, unsubscribing is usually the better choice. Unsubscribe removes you from the sender's mailing list entirely, so you stop receiving messages from that legitimate business. Blocking just sends their emails to spam, but they keep sending them.

Use blocking for emails you did not sign up for — spam, phishing attempts, harassment, or messages from people you want to avoid. Unsubscribe works only if the sender is a real business that honors the request, which most legitimate companies do. Spam senders and scammers rarely include a real unsubscribe link, so blocking is your only option.

Setting up filters and rules to catch patterns

Blocking one address at a time works for a few unwanted senders, but if you get a lot of similar spam, filters are faster. In Gmail, go to Settings > Filters and Blocked Addresses > Create a new filter. You can filter by sender address, subject line keywords, or words in the message body. Once you create the filter, choose what happens to matching emails — usually "Skip the Inbox (Archive)" or "Delete it".

In Outlook, go to Settings > Mail > Junk Email > Safe Senders, Blocked Senders, or Safe Domains. You can add entire domains (like @spamcompany.com) to block all emails from that organization at once. You can also create rules in Outlook by going to Settings > Mail > Rules > Add New Rule, which lets you filter by sender, subject, or content and move matching messages to a folder or delete them.

Apple Mail does not have a built-in filter interface in the same way, but you can create rules by going to Mail > Preferences > Rules. Set the condition (sender, subject, or content) and the action (move to folder, delete, or mark as spam). Rules run automatically on incoming mail and on mail you already have.

Blocking entire domains and email addresses

If spam comes from many addresses at the same domain (like spammer@badcompany.com, noreply@badcompany.com, support@badcompany.com), blocking the whole domain is more efficient than blocking each address. In Gmail, create a filter for "from:@badcompany.com" and set it to delete or archive. In Outlook, add @badcompany.com to your Blocked Senders list under Junk Email settings. In Apple Mail, create a rule where the sender contains "@badcompany.com".

Be careful when blocking domains — if you block a common domain like @gmail.com or @outlook.com, you will block legitimate emails from anyone using that service. Only block entire domains if you are certain you do not need mail from anyone at that organization.

What to do if blocking does not stop the emails

If emails keep arriving after you block the sender, the spammer is likely using a new address each time. This is common with bulk spam and phishing campaigns. In this case, blocking individual addresses will not solve the problem — you need a filter that catches the pattern instead. Look for what the spam messages have in common: a keyword in the subject line, a specific phrase in the body, or a domain name. Create a filter based on that pattern rather than the sender address.

If the emails are coming from your own email address or a spoofed version of it, the sender is faking the "from" line. Blocking will not work because the "from" address changes with each message. Create a filter for a keyword or phrase that appears in every message instead. If the spam is severe or threatening, report it to your email provider's abuse team — most services have a way to report phishing or harassment.

Reporting spam and phishing to your email provider

Most email services let you report spam or phishing directly from the message. In Gmail, click the three dots and select "Report phishing" or "Report spam". In Outlook, right-click the message and choose "Report > Report Phishing" or "Report > Report Junk". In Apple Mail, select the message and go to Mail > Junk Mail > Mark as Spam. Reporting helps your email provider improve its spam filters for everyone.

If you receive threatening, harassing, or sexually explicit emails, report them to your provider's abuse team in addition to blocking the sender. Most services have an abuse report form on their website or in their help center. Include the full message headers (which show the actual path the email took) if possible — this helps investigators trace the source.

Frequently Asked Questions

Does blocking someone stop them from seeing my emails?

No. Blocking only affects what you receive — it stops their messages from reaching your inbox. If you send them an email, they will still get it. Blocking is one-way protection for your inbox, not a way to hide from someone.

Can I block emails by subject line or content instead of sender?

Yes, but only through filters, not through the block button. Create a filter in your email settings and set the condition to match the subject line or words in the message body. This is useful for spam that comes from many different addresses but always has the same subject or content.

What happens to emails from blocked senders?

They go to your spam or junk folder automatically. You can still see them if you check that folder, and you can unblock the sender to move them back to your inbox. Some services let you choose whether blocked mail is deleted or moved to spam when you set up the block.

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

No. When you block someone, they do not receive a notification. Their emails just go to spam, and they have no way to know whether you blocked them, marked them as spam, or simply did not read their message.

Can I block emails on my phone the same way as on a computer?

Yes. In Gmail on mobile, open the message, tap the three dots, and select "Block". In Outlook mobile, swipe left on the message and tap the block icon. In Apple Mail on iPhone, swipe left on the message and tap "Mark as Junk". The process is slightly different but achieves the same result.