Shop can't send emails from IDN domains

[Prestaworks]

Prerequisites

• I understand and accept the project's code of conduct.
• I have already searched in existing issues and found no previous report of this bug.

Describe the bug and add attachments

If the shop is configured with an IDN domain (domain with åäö for instance) as a contact email, it's not possible to send emails, all you get is the error
"Expected response code 354 but got code "554", with message "554 5.5.1 Error: no valid recipients "
if trying to send the test mail to the IDN domain you get the error
Address in mailbox given [xxxxxxxxx] does not comply with RFC 2822, 3.6.2.

Expected behavior

Emails should be possible to be send even if an IDN domain is used.

Steps to reproduce

1. Go to configure -> shop parameters -> contact.
2. Go to second tab Stores
3. Enter a shop email with an IDN domain like [email protected]
4. Go to Advanced parameters -> e-mail
5. Try to send a test email using smtp.

PrestaShop version(s) where the bug happened

8.1.5

PHP version(s) where the bug happened

7.4.9

If your bug is related to a module, specify its name and its version

No response

Your company or customer's name goes here (if applicable).

Prestaworks AB

[florine2623]

Hello @Prestaworks ,

I reproduce the issue with PrestaShop version 8.1.x and develop, I'll add this to the backlog so it can be fixed.

1.7.8.x, 8.1.x : error message

develop : loads forever

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