SMTP IDN # # Server-side CAPA SMTPUTF8 # # Client-side smtp idn !win32 LC_ALL=en_US.UTF-8 LC_CTYPE=en_US.UTF-8 perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");' SMTP with SMTPUTF8 support - UTF-8 based sender From: different To: another body smtp://%HOSTIP:%SMTPPORT/965 --mail-rcpt recipient@example.com --mail-from Avsändaren@åäö.se -T - # # Verify data after the test has been "shot" EHLO 965 MAIL FROM: SMTPUTF8 RCPT TO: DATA QUIT From: different To: another body .