Email address with international (non-english) characters?

[saintego]

Bug report

Describe the bug

I got error: Invalid "to" email address with value "mxxxáčxxxá@gmail.com". Seems that email with characters like áč should be valid on last place before "@" by RFC 6532. Services like gmail are accepting it also and many validators too, like https://www.npmjs.com/package/@sparser/email-address-parser.

Steps to reproduce the behavior

1. Try to send template ti address with characters like áč
2. See error

Expected behavior

I accept that there will be no error

Screenshots

If applicable, add screenshots to help explain your problem.

Code snippets

isValidEmail in strapi-plugin-email-designer/server/services/email.js should allow to use special characters on last place before @