More than one option in Blacklisted Emails not working

I would like to add in the Blacklisted Emails field more than one word to block

If I add one word in this field for example:
word1
blocking works correctly.

If I add more items, for example
word1
word2
word3
it does not work. The order can be sent even though the e-mail address contains one of the blocked words. I have tried many different ways of adding words and none of them works.