Since WP 5.7 mail sent with send address other than domain is marked as possible spam

[janv01]

After upgrade to wp 5.7 a mail sent within Woocommerce to customer is marked as possible spam.
5.6.2 and before did not have this problem.
Since 5.7 mail sent with sender mail address that has not the domain in it (in my case this is a gmail account while domain is different), gmail is marking the mail as possible spam.
In the mail sent with 5.6.2 a via was shown next to the sender address.
In the mail sent with 5.7 NO via was shown next to the sender address.

Google says this about via:
Extra info next to sender’s name
You may see extra information next to someone's name when they send you a message. For example, you could get an email from your bank, but the sender's email address is from a different site.

[audrasjb]

Hello @janv01 welcome to WordPress Trac and thanks for reporting this issue,

We are already tracking this issue in #52822.

Thanks