Concentric

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55 Almaden Boulevard, 7th Floor
San Jose, CA 95126
About Concentric
  • Concentric® provides businesses with scalable and affordable messaging, collaboration, and web hosting services uniquely delivered in a single account. With this approach, you can manage any combination of webmail, domain-based email, GroupWare, calendaring and collaboration features easily with one user name and login from one control panel. And you have the flexibility to add applications and resources as your business grows.
    For businesses with on-premise email servers that want enterprise-class spam and virus filtering, Concentric offers Perimeter Email Protection (PEP), a complete email protection service for businesses hosting their own on-premise email servers. It includes tools to filter and authenticate incoming email before it reaches the business’ email infrastructure. By stopping spam and email-based attacks at the perimeter, PEP can reduce email load, and spam by 90 percent or more. PEP prevents spam, viruses, directory harvesting, denial-of-service or dictionary attacks, fraud, phishing schemes, and other debilitating email bombs or attacks from reaching a business’ corporate email server. PEP and PEP Filtering ensures that only clean, valid and properly addressed email is sent to company email servers for final delivery.
    PEP also includes free email delivery back up. Should a business’ email server stop receiving incoming mail, Concentric will spool that mail at no extra charge for up to five days and re-deliver it quickly when the business’ server is back up. Reliability, depth of features and a professional support team make Concentric email and anti spam services the "tools-of-choice" for thousands of businesses.
    Additionally, Concentric hosts domains for companies of all sizes ranging from one employee to organizations with high-traffic, large-bandwidth needs and is the only service to hold a patent for Clustered Hosting architecture. Leveraging this unique technology configuration, Concentric offers a virtually inexhaustible server resource with built-in redundancy, and delivers superior performance and reliability on demand.
    Concentric was founded in 1997. Acquired by Nextlink on Jan. 10, 2000, the two companies merged to become XO™ Communications. In 2004, Concentric returned to the market as an XO Communications service continuing its award-winning culture of innovation. Concentric is based in San Jose, California.
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