Solutions in the email client space tend to be single-purpose applications that help the user read, send, and manage email as well as manage their address books. Microsoft Outlook is the commercial market leader in this space, as it is used on more than 60% of corporate desktops. Historically, these applications tended to be islands unto themselves, but now most are moving toward supporting external mail-related standards as they mature. For instance, LDAP is supported for address books, and the PGP, GPG, SSL, and TLS standards are supported for security.
All decent email clients should support the ability to read, send, and manage email. Features to sort the collection of messages by time and sender are also expected. Email clients should also allow users to easily manage their address books, at a bare minimum.
The state-of-the-art email clients, meanwhile, are expected to handle HTML mail and to thread together group messages related to a single conversation. The current trend is to improve search features that can quickly search across a large mailbox, as well as to provide dynamic filtering criteria that are kept up-to-date as new messages arrive. Another option to look for is support for
. Virtual folders allow the user to view messages in one folder that are located in several other folders, based on a search criterion. Novell Evolution provides support for virtual folders. Email
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