Re: messages with international Unicode E-mail addresses

"Sergey Poznyakoff" <[email protected]> Sat, 26 Jun 2021 07:02:01 +0200

Newsgroups	gmane.comp.gnu.mailutils.bugs
Organization	GNU.org.ua
Message-ID	<[email protected]>

Hi Jean,

> What could cause this?
> 
>  <<< 553-The recipient's mail server does not support E-mail

Your message contains unencoded 8-bit characters in one or more of its
headers.

Best regards,
Sergey