Are you safe if you enter your email address and check on that site?

I guess you will be not. It is a trap. Instead showing your email address publicly, on the forum and anywhere else, you enter it and check on that site. Are you sure that they won't keep your email address on their database and will see it to other companies?

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Please make sure that:

• Don't publicly show your email address.
• For important accounts, allocate specific emails for those accounts and don't use them for other purposes on other platforms.
• Don't self-breach your email address by arbitrarily enter your email addresses and check on any site (like what you supposed)