Get Block Sender for Firefox

Download and install the Block Sender plugin securely

Install Block Sender

When prompted, click "Allow" to complete the installation.

How to Use Block Sender

Join the thousands of people around the world,
free yourself from unwanted email.

Gmail does an excellent job of blocking spam, but sometimes you just want to go the extra mile and prevent some mail from ever reaching your account.
Dave Greenbaum
If you’re looking to block unwanted emails, particularly from certain senders who send you unsolicited messages, an extension for Google Chrome called Block Sender is a great solution.
Kim Barloso
Make Tech Easier
While Gmail is quite good at blocking spam, nothing had particularly worked for me until I gave Block Sender a shot. This handy little extension for Google Chrome makes blocking Gmail spam ever easier...
Waqas Ahmed
Addictive Tips

Choose a free or premium unlimited blocking plan

Free Plan


For individuals. Try it now!

  • Block a few messages
  • No premium filters
  • Works with Gmail
Install now

Premium Plan


per month

  • Unlimited Blocks
  • Premium Filters
  • Works with Gmail
  • Works with Google Apps
  • Free Upgrades
Buy now

Premium Yearly


$59 $19

per year (60% off monthly)

  • Bounce Back Any Email
  • Unlimited Blocks
  • Premium Filters
  • Works with Gmail
  • Works with Google Apps
  • Free Upgrades
Get your offer



Share up to 10 accounts

  • 1 entire year of premium
  • Bounce Back Any Message
  • Good for companies
  • Share with employees
  • Works with Google Apps
  • Unlimited Blocks
  • Free Upgrades
Buy now

Gmail™ User Reviews

Lots of options. And can be used regularly
A good improvement to anti-spam
A must have for your inbox

My daughter has been receiving incredibly explicit spam mail recently and this "Block Sender" app has really helped put a stop to those disgusting emails.
I was getting SO MUCH spam on my primary email address that I had to start using another address, but was still being plagued by daily spam when I saw this app. I downloaded it and have waited now for a while to be sure it was working, but can say without a doubt this app works. I open my spam folder, open each message, block sender and delete forever and that seems to stem the flow of this burdensome nuisance.
Jay Rose
Been hoping for this for a long time, It's great.
Love it, love it!! (evil grin) all of the deadbeats that ignore your unsubscribe get what they have coming to them with a simple keystroke...awesome!
I'm glad we have a blocker, these emails are driving me nuts and I don't want to change my email account.
Tall Sally
Still experimenting with whether to block a domain or just the subject line. It's been very useful in blocking an ex friend who likes to send nasty emails once the friendship is over. Also works for spam that doesn't ever get picked up by the Mac mail program.
Just what I needed to block a CRAZZZZZY Ex....
A Google User
Awesome and helpful. Keeps unwanted mails away!
Maitreyi M
Great app. Easy to use. The Block icon shows up right in your toolbar. Have option to send a Canned response and if that is not enabled already, the app has a button to take you right to it and enable it.
Since a long time my email id was going through spamming and I was really fed up of unwanted mails that were coming every single day.This wonderful app helped me a lot and I am completely satisfied with it.Also its quite easy to use.
It is a great way to get rid of email from people who might try to cyber bully you.
A Google User
Should be a feature of Gmail anyway.
Darren Williams