A couple of days ago, Google announced useful improvements for Gmail service with the option to recognize e-mail addresses that included non-Latin characters. Now, the well-known search engine wants to make sure that these new features aren’t affected by potential spammers trying to deliver harmful messages.
In order to keep your e-mail account safe and protected, as well as to be one step ahead unwanted spammers, the Unicode community has found different combinations of suspicious letters in e-mail that will be immediately rejected by Gmail.
These changes aim to provide users around the globe a safe version of Gmail account and to have a pleasant experience in the chosen language, ensuring that international domains are legitimately used.
Source: Google Security Blogby