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International email arises from the combined provision of internationalized domain names (IDN) [1] and email address internationalization (EAI). [2] 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 format of an email address is local-part@domain, where the local-part may be up to 64 octets long and the domain may have a maximum of 255 octets. [5] The formal definitions are in RFC 5322 (sections 3.2.3 and 3.4.1) and RFC 5321—with a more readable form given in the informational RFC 3696 (written by J. Klensin, the author of RFC 5321 [6]) and the associated errata.
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.
Email allows asynchrony: each participant may control their schedule independently. Batch processing of incoming emails can improve workflow compared to interrupting calls. Reducing cost Sending an email is much less expensive than sending postal mail, or long distance telephone calls, telex or telegrams. Increasing speed
Sender ID is an historic [1] anti-spoofing proposal from the former MARID IETF working group that tried to join Sender Policy Framework (SPF) and Caller ID. Sender ID is defined primarily in Experimental RFC 4406, [ 2 ] but there are additional parts in RFC 4405, [ 3 ] RFC 4407 [ 4 ] and RFC 4408.
The sortable table below contains the three sets of ISO 3166-1 country codes for each of its 249 countries, links to the ISO 3166-2 country subdivision codes, and the Internet country code top-level domains (ccTLD) which are based on the ISO 3166-1 alpha-2 standard with the few exceptions noted.
.id is the Internet country code top-level domain for Indonesia.It is first registered in February 1993. Since 2007, it is managed by the Indonesian Internet Domain Name Administrator (Pengelola Nama Domain Internet Indonesia or PANDI), [3] based on regulation set by Decree of Minister of Communication and Information Technology (now Ministry of Communication and Digital Affairs).
Email clients using IMAP generally leave messages on the server until the user explicitly deletes them. This and other characteristics of IMAP operation allow multiple clients to manage the same mailbox. Most email clients support IMAP in addition to Post Office Protocol (POP) to retrieve messages. [6] IMAP offers access to the mail storage.