The fastest way to block an email address in Gmail
Open the email from the sender you want to block. Click the three vertical dots (more actions menu) in the top right of the email. Select "Block [sender's name]" from the dropdown. Gmail will when ready send future emails from that address to your spam folder and remove any existing emails from that sender from your inbox.
That single action does three things at once: it hides past messages, stops future ones from appearing, and marks the sender as spam in your account. You do not need to create filters or rules separately — blocking handles it all.
Key Takeaways
- Blocking an email address sends all future messages from that sender straight to spam and hides their past emails from your inbox.
- You can block from the email itself using the three-dot menu, or from the sender's contact card in your contacts list.
- Blocked senders can still send you mail — it just lands in spam instead of your inbox, so you can review it later if needed.
- If you block someone by mistake, you can unblock them by searching for their address in Gmail settings under Blocked addresses.
- For emails you want to keep but organize separately, use filters instead of blocking — filters move mail to folders without hiding it.
Where to find the block option if the email is already open
When you are reading an email, look at the toolbar above the message. You will see a back arrow, a trash icon, and a three-dot menu on the right side. Click that three-dot menu. A list appears with options including "Block [sender]". Click it once and the block is set.
Gmail will show you a confirmation message saying the sender has been blocked. At that moment, any emails from that address that are already in your inbox disappear — they move to spam automatically. Future emails from that sender will go directly to spam without ever hitting your inbox.
Blocking from your contacts or from a forwarded email
If someone has forwarded you an email from a person you want to block, you can block the original sender even though you did not receive the email directly. Open the forwarded message, click the three-dot menu, and select "Block [original sender's name]". This works the same way as blocking a direct email.
You can also block someone from your contacts list. Go to Google Contacts (contacts.google.com), find the person's name, click on their contact card, and select the three-dot menu at the top right. Choose "Block" from the options. This blocks them in Gmail and across other Google services you use.
The difference between blocking and filtering
Blocking removes a sender from your inbox entirely — their emails go to spam and you do not see them unless you check your spam folder. Filtering lets you keep the emails but move them to a label or folder automatically. Choose blocking if you never want to see the sender again. Choose filtering if you want to organize their emails separately but might need to read them later.
To create a filter instead of blocking, open an email from that sender, click the three-dot menu, and select "Create filter". You can then choose what happens to future emails — move them to a label, mark them as read, or send them to trash. Filters are useful for newsletters you signed up for but want out of your main inbox, or for work emails you want grouped by project.
What happens to emails after you block someone
When you block an address, Gmail moves all existing emails from that sender to your spam folder. They do not disappear — they sit in spam where you can still find them if you need to. Your spam folder keeps emails for 30 days before deleting them automatically, so you have a month to recover a message if you blocked someone by mistake.
If you want to permanently delete their emails instead of just moving them to spam, you can go to your spam folder, find their messages, select them, and click delete. But blocking alone does not erase anything — it just hides it from your main inbox.
How to unblock an email address if you change your mind
Go to Gmail settings by clicking the gear icon in the top right corner and selecting "See all settings". Click the "Filters and Blocked Addresses" tab. Scroll down to the "Blocked addresses" section. You will see a list of every address you have blocked. Find the one you want to unblock and click "Unblock" next to their name.
Once you unblock someone, their emails will no longer go automatically to spam. Any new messages from them will arrive in your inbox like normal. This does not restore their old emails from your spam folder — those stay in spam unless you move them back manually.
Blocking domains instead of single email addresses
If you are getting spam from many addresses at the same domain (for example, spammer@badsite.com, noreply@badsite.com, and sales@badsite.com), you can block the entire domain instead of blocking each address one by one. Open any email from that domain, click the three-dot menu, and look for "Block [domain name]". This stops all email from anyone at that domain.
Be careful with this option — if you block a domain, you will not receive emails from anyone using that domain, including legitimate senders. Only block a whole domain if you are certain you do not need mail from anyone there. For most cases, blocking individual addresses is safer.
Frequently Asked Questions
Can someone tell if I blocked them?
No. When you block someone, they do not receive a notification. Their emails still send successfully from their end — they just land in your spam folder instead of your inbox. They have no way to know you blocked them unless you tell them.
What if a blocked sender uses a different email address?
Blocking only stops emails from the specific address you blocked. If someone creates a new email account and sends you a message from that address, it will arrive in your inbox normally. You would need to block the new address separately. For persistent harassment from multiple addresses, consider reporting the emails as spam or phishing instead.
Do I need to block someone if I just want to unsubscribe from their emails?
No. Most legitimate emails have an "Unsubscribe" link at the bottom. Click it to remove yourself from their mailing list. Blocking is for unwanted senders or spam — unsubscribing is for newsletters and marketing emails you signed up for but no longer want. Unsubscribing is usually faster and cleaner.
Can I block emails by subject line or content instead of by sender?
Not with the block feature, but you can use filters to do this. Create a filter that searches for specific words in the subject or body, then have Gmail automatically send those emails to spam or a folder. Go to Settings, click "Filters and Blocked Addresses", and select "Create a new filter" to set this up.
If I block someone, will they still see my replies to old emails?
If you already replied to them before blocking, they will see those replies — blocking does not erase past conversations. Blocking only affects new emails going forward. If you want to remove access to old conversations, you would need to delete those emails from your sent folder manually.