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The mbox format uses a single blank line followed by the string 'From ' (with a space) to delimit messages; this can create ambiguities if a message contains the same sequence in the message text. Over the years, four popular but incompatible variants arose: mboxo , mboxrd , mboxcl , and mboxcl2 .
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) and the associated errata.
The confusion caused by the X.400 addressing format led to the creation of the X.500 standard for directory services.The idea was to create a hierarchical and standardized email address directory with replication and distribution functionality that allowed multiple organizations to produce a single public directory.
This list of Internet top-level domains (TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet. A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. [ 1 ]
While most of these services are individually available at no cost to consumers who use their free Google (Gmail) accounts, Google Workspace adds enterprise features such as custom email addresses at a domain (e.g. @your), an option for unlimited Drive storage, administrative tools and advanced settings, as well as 24/7 phone and email support.
The domain gmail.com became unavailable in Germany due to trademark disputes, in which cases users must use the domain googlemail.com. [30] From that point forward, visitors originating from an IP address determined to be in Germany would be forwarded to googlemail.com where they could obtain an email address containing the new domain.
Gmail is the email service provided by Google.As of 2019, it had 1.5 billion active users worldwide, making it the largest email service in the world. [1] It also provides a webmail interface, accessible through a web browser, and is also accessible through the official mobile application.
Dot-separated fully qualified domain names are the primarily used form for human-readable representations of a domain name. Dot-separated domain names are not used in the internal representation of labels in a DNS message [7] but are used to reference domains in some TXT records and can appear in resolver configurations, system hosts files, and URLs.