X2Y2 NFT marketplaces added anti-phishing protection after the incident with OpenSea
X2Y2

Many users found their tokens stolen after signing a malicious transaction from a phishing email from OpenSea. An OpenSea competitor X2Y2, took immediate action by adding the anti-phishing feature.
The anti-phishing code feature is now live on X2Y2. You can add your code at: https://t.co/o1Ab2JH6MX
— X2Y2 ⭕️ | NFT Marketplace (@the_x2y2) February 20, 2022
You can set a long one with up to 20 numbers and alphabets. https://t.co/6T78Qg46x9 pic.twitter.com/wYdu3z8PAv
There you can set any passphrase that will be added to every email from X2Y2 so you can ensure that it is valid. This option is available under the notifications tab under the profile settings section.