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An email address consists of two parts, a local-part (sometimes a user name, but not always) and a domain; if the domain is a domain name rather than an IP address then the SMTP client uses the domain name to look up the mail exchange IP address. The general format of an email address is local-part@domain, e.g. jsmith@[192.168.1.2], jsmith ...
International email, by contrast, uses Unicode characters encoded as UTF-8 —allowing for the encoding the text of addresses in most of the world's writing systems. [4] The following are all valid international email addresses : 用户@例子.广告 ( Chinese, Unicode ) ಬೆಂಬಲ@ಡೇಟಾಮೇಲ್.ಭಾರತ ( Kannada, Unicode)
Internet mail standard. Internet e-mail functions through the use of Internet Standards. Although many more standards actually apply to e-mail, virtually all mail servers and e-mail clients support at least the following basic set: Simple Mail Transfer Protocol (SMTP) specifies the protocol (RFC 5321, see below) by which e-mail is transmitted.
X.400. X.400 is a suite of ITU-T recommendations that define the ITU-T Message Handling System (MHS). At one time, the designers of X.400 were expecting it to be the predominant form of email, but this role has been taken by the SMTP -based Internet e-mail. [1]
2. In the "To" field, type the name or email address of your contact. 3. In the "Subject" field, type a brief summary of the email. 4. Type your message in the body of the email. 5. Click Send. Want to write your message using the full screen? Click the Expand email icon at the top of the message.
In particular, this allows email addresses to use non-ASCII characters. Such addresses are supported by Google and Microsoft products, and promoted by some government agents. The message header must include at least the following fields: From: The email address, and, optionally, the name of the author(s). Some email clients are changeable ...
• Fake email addresses - Malicious actors sometimes send from email addresses made to look like an official email address but in fact is missing a letter(s), misspelled, replaces a letter with a lookalike number (e.g. “O” and “0”), or originates from free email services that would not be used for official communications.
E.164 is an international standard ( ITU-T Recommendation), titled The international public telecommunication numbering plan, that defines a numbering plan for the worldwide public switched telephone network (PSTN) and some other data networks . E.164 defines a general format for international telephone numbers.