I think i've discovered a little vulnerability on your website i don't know if she is outside the bug bounty program. In the newsletter field, the incorrect email addresses (for example with special characters) it's not accpeted. But with a specific HTTP request it's possible to bypass this verification.
For example I use this email: <<email@example.com In the newsletter field this email it's blocked but with the specific HTTP request this email it's accepted by the website.
URL: https://www.boozt.com/fr/fr/newsletter POST DATA: subscription%5Bemail%5D=<<test%40gmail.com&subscription%5Bgender%5D=MALE&subscription%5BcountryId%5D=9&subscription%5BlanguageId%5D=8&subscription%5Bposition%5D=footer
I have added to this report, two screenshots of the problem.