Castles Business Class Email

Reliable email hosting services with 99.99% uptime.
Webmail, IMAP, or POP email with integrated security, virus scanning, and spam filtering.

Rich Web Mail

The Web Mail Rich Text Editor (RTE) enables you to compose and reply to email with messages styled using formatting tools similar to those found in most modern word processors.


Castles Information Network is an ISP (Internet Service Provided), in business since 1985. Over time we’ve discovered that partnerships with specialized companies server our customers the best. These partnerships let us offer robust and reliable products and services letting us concentrate on the customer service end of the business. This keeps us focused on what’s important and at the same time lets us keep the cost of providing those services down. has been a strategic partner of Castles since 2003. That’s a very long time for a relationship in the world of technology. was established in 1998 and has been a leader in Software as a Service (SaaS) email and messaging, managing more than 6 billion message connections each month and over 300,000 domains worldwide.

The one_business family of products from delivers a secure environment to create, share and communicate. If your organization requires a business-grade email solution backed by expert technical support, look no further than one_business. The one_business hosted platform is Outlook-compatible and provides advanced features such as mobile syncing,  message archiving  and online file storage . All integrated and easy to use!

Castles provides the same business class email to both web hosting and Email Only customers.