[janusz]

Interesting points from the erine's FAQ (with my emphasis)

❔ How do I whitelist my erine.email addresses on GMail?

Open GMail.
In the search box at the top, click the down arrow.
Enter @erine.email in the To section.
At the bottom of the search window, click Create filter with this search.
Tick Never send it to Spam.
Click Create filter.

❔ How do I whitelist my erine.emailaddresses on Yahoo mail?
Unfortunately, this feature is not available. The only way you have is to mark
your email as Not Spam (if it was sent to spams):

Open Yahoo Mail.
Click on the Spam folder.
Select the email.
Click Not Spam at the top of the page.
The email will return to your Inbox.

You should do this a few times before Yahoo Mail learns that the emails are
legit. Due to this reason, we do not recomand to use erine.email with Yahoo Mail .