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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 .
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 ...
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 ...
Headers: Permanent Message Header Field Names; RFC 6265: IETF HTTP State Management Mechanism; RFC 9110: HTTP Semantics; RFC 9111: HTTP Caching; RFC 9112: HTTP/1.1; RFC 9113: HTTP/2; RFC 9114: HTTP/3; RFC 7239: Forwarded HTTP Extension; RFC 7240: Prefer Header for HTTP; HTTP/1.1 headers from a web server point of view
The set of Internet RFC documents RFC 6530, RFC 6531, RFC 6532, and RFC 6533, all of them published in February 2012, define mechanisms and protocol extensions needed to fully support internationalized email addresses. These changes include an SMTP extension and extension of email header syntax to accommodate UTF-8 data. The document set also ...
This allows a receiving service to validate an email when the email's SPF and DKIM records are rendered invalid by an intermediate server's processing. [1] ARC is defined in RFC 8617, published in July 2019, as "Experimental". [2]
Message-ID is a unique identifier for a digital message, most commonly a globally unique identifier used in email and Usenet newsgroups. [1] Message-IDs are required to have a specific format which is a subset of an email address [2] and be globally unique. No two different messages must ever have the same Message-ID.
However, there are many similar email header fields that all contain sending party information; therefore Sender ID defines in RFC 4407 [4] a Purported Responsible Address (PRA) as well as a set of heuristic rules to establish this address from the many typical headers in an email.