On Tuesday 20 August 2019 07:32:27 CEST, Dmitry Belyavsky wrote:
> https://github.com/roundcube/roundcubemail/issues/6891

I commented on the issue page that this doesn't appear to make any
difference: Impersonators manage just fine without using homographs today,
and they'd manage just fine with, too. Six of one, half a dozen of the
other.

Also that the issue arises in the first place because Roundcube is
prettifying stray xn--blah usage, which the standards neither require nor
suggest. The standards have good reasons for that.