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An email alias may be used to create a simple replacement for a long or difficult-to-remember email address. It can also be used to create a generic email address such as webmaster@example.com and info@example.com. On UNIX-like systems, email aliases may be placed into the file /etc/aliases and have the form:
In the Domain Name System (DNS) hierarchy, a second-level domain (SLD or 2LD) is a domain that is directly below a top-level domain (TLD). For example, in example.com, example is the second-level domain of the .com TLD. Second-level domains commonly refer to the organization that registered the domain name with a domain name registrar.
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.
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.
Google Account users may create a publicly accessible Google profile, to configure their presentation on Google products to other Google users. A Google profile can be linked to a user's profiles on various social-networking and image-hosting sites, as well as user blogs .
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.
A Primary username is the name you created when you first signed up for an AOL account. In the past, AOL offered the ability to create secondary usernames linked to this Primary username, however, as of November 30, 2017, the ability to add or manage additional usernames has been removed.
Single-letter second-level domains are domains in which the second-level domain of the domain name consists of only one letter, such as x.com.In 1993, the Internet Assigned Numbers Authority (IANA) explicitly reserved all single-letter and single-digit second-level domains under the top-level domains com, net, and org, and grandfathered those that had already been assigned.