SMTP IDN # # Server-side CAPA SMTPUTF8 # # Client-side smtp IDN !win32 codeset-utf8 LC_ALL=C.UTF-8 SMTP with SMTPUTF8 support - UTF-8 based sender From: different To: another body smtp://%HOSTIP:%SMTPPORT/%TESTNUMBER --mail-rcpt recipient@example.com --mail-from Avs%hex[%c3%a4]hex%ndaren@%hex[%c3%a5%c3%a4%c3%b6]hex%.se -T - # # Verify data after the test has been "shot" EHLO %TESTNUMBER MAIL FROM: SMTPUTF8 RCPT TO: DATA QUIT From: different To: another body .