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RFC 6532, with Abel Yang and Shawn Steele, Internationalized Email Headers, RFC 6152, with John Klensin , Marshall Rose, and Dave Crocker, SMTP Service Extension for 8bit-MIMEtransport, RFC 6009, Sieve Email Filtering: Delivery Status Notifications and Deliver-By Extensions,
The result is email that contains international characters (characters which do not exist in the ASCII character set), encoded as UTF-8, in the email header and in supporting mail transfer protocols. The most significant aspect of this is the allowance of email addresses (also known as email identities) in most of the world's writing systems ...
To use Unicode in the domain part of email addresses, IDNA encoding must traditionally be used. Alternatively, SMTPUTF8 [3] allows the use of UTF-8 encoding in email addresses (both in a local part and in domain name) as well as in a mail header section. Various standards had been created to retrofit the handling of non-ASCII data to the ...
RFC 5321, as well as RFC 2821, states that non-delivery reports must be sent to the originator as indicated in the reverse path after an MTA accepted the responsibility for delivery. However, the bounce message may be suppressed when the original content is hostile (cf. spam or virus mail) or the message is forged (RFC 5321, Section 6).
The email clients will perform formatting according to RFC 5322 for headers and body, and MIME for non-textual content and attachments. Headers include the destination fields, To , Cc (short for Carbon copy ), and Bcc ( Blind carbon copy ), and the originator fields From which is the message's author(s), Sender in case there are more authors ...
Email spoofing occurs when the email message header is designed to make the message appear to come from a known or trusted source. Email spam and phishing methods typically use spoofing to mislead the recipient about the true message origin. Email spoofing may be done as a prank, or as part of a criminal effort to defraud an individual or ...
The client can choose to respond to this request by advertising the requested information about itself by sending the data using a specific part of the HTTP protocol called HTTP header fields or by exposing the same information to the JavaScript code being executed on a web page. This can then help the server tailor its responses to the client ...
It is specified in a series of requests for comments: RFC 2045, RFC 2046, RFC 2047, RFC 4288, RFC 4289 and RFC 2049. The integration with SMTP email is specified in RFC 1521 and RFC 1522 . Although the MIME formalism was designed mainly for SMTP, its content types are also important in other communication protocols .