User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; .NET4.0E; .NET4.0C; .NET CLR 3.5.30729; .NET CLR 2.0.50727; .NET CLR 3.0.30729; McAfee; GWX:QUALIFIED; rv:11.0) like Gecko Steps to reproduce: --- New Feature --- Actual results: --- New Feature --- Expected results: Hello Mozilla-Team ! Is it possible to provide Support for RFC 6531 (SMTPUTF8) ? https://tools.ietf.org/html/rfc6531 Regards, Martin

On the SMTP client side, this is pretty easy to support; primarily just add the 'SMTPUTF8' MAIL FROM parameter if the server advertises it and the client is using one or more of: 1. a UTF-8 local part for mail from/rcpt to 2. a UTF-8 domain for mail from/rcpt to 3. an email message with UTF-8 un-encoded in the header (RFC 6532 format) That 3rd case is required by the standard but may not be as important in practice since many servers will accept such email messages whether or not they are properly negotiated. I don't have cycles to do this myself, but if someone picks this up, I'm willing to help with design/code reviews.