Courier (e-mail client)
Encyclopedia
Courier is an email client used on Microsoft Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

.
The software was originally developed as Calypso and was renamed after transition to RoseCitySoftware.

History

With the release of version 3.5, Courier became freeware, and a project was initiated to enhance the product to a Version 4.0. Courier provides encryption in the inbox and retains addresses and mail and attachments together.

Courier supports the POP3
Post Office Protocol
In computing, the Post Office Protocol is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP and IMAP are the two most prevalent Internet standard protocols for e-mail retrieval. Virtually all modern...

, IMAP
Internet Message Access Protocol
Internet message access protocol is one of the two most prevalent Internet standard protocols for e-mail retrieval, the other being the Post Office Protocol...

 and SMTP
Simple Mail Transfer Protocol
Simple Mail Transfer Protocol is an Internet standard for electronic mail transmission across Internet Protocol networks. SMTP was first defined by RFC 821 , and last updated by RFC 5321 which includes the extended SMTP additions, and is the protocol in widespread use today...

 protocols and provides several features for HTML security. IMAP is supported only in that access is given to the messages on the server, then the program treats the account as if it was a POP3 account by downloading all new messages to the local computer (with the option of deletion).

The beta test phase for version 3.6 was shut down in February, 2008, due to delays in achieving defined milestones. An upgrade path was negotiated with PocoSystems to add Courier-type features to Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

and direct Courier users to migrate to PocoMail 4.8 as a replacement for Courier 3.5. See http://www.rosecitysoftware.com/courier/ No further development under the Courier name is planned. Pocomail 4.8 was released in April, 2009. Free versions of the unfinished beta, requiring no registration, are available at the Yahoo Courier user group at http://tech.groups.yahoo.com/group/courieremailforum/

External links

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