Obligatory Preamble:

	Microsoft Outlook 2007:
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Microsoft Outlook or Outlook (full name Microsoft Office Outlook since Outlook 2003) is a personal information manager from Microsoft, and is part of the Microsoft Office suite. Although often used mainly as an e-mail application, it also provides a calendar, task and contact management, note taking, a journal and web browsing. It can be used as a stand-alone application, but can also operate in conjunction with Microsoft Exchange Server to provide enhanced functions for multiple users in an organization, such as shared mailboxes and calendars, public folders and meeting time allocation.

Internet Standards:

Outlook is an integrated application for email, calendaring, tasks, contacts and much more. However, it does not fully support other calendar programs for calendaring or contacts such as iCalendar, CalDAV, SyncML and vCard 3.0. Outlook 2007 claims to be fully iCalendar compliant; however, it does not support all core objects, such as VTODO, VJOURNAL. Also, Outlook supports vCard 2.1 and does not support multiple contacts in the vCard format as a single file. Outlook has also been criticized for having proprietary "Outlook extensions" to these Internet standards. Also, for Outlook 2007, Microsoft has replaced the more standards-compliant Internet Explorer-based HTML editing/viewing engine with the one from Microsoft Office Word 2007.

Security Concerns:

One of Microsoft's goals is for the e-mail client to be easy to use. However, the embedded automation and lack of security features compared to competitors have been repeatedly exploited by malicious hackers using e-mail viruses. These typically take the form of an e-mail attachment which executes on the user's machine and replicates itself by mass-mailing the user's or Exchange server's address list. Examples of such viruses are the Melissa and Sobig worms. Other programs have exploited Outlook's HTML e-mail capabilities to execute malicious code or confirm that e-mail addresses are valid targets for spam. The notoriety of the worms and other viruses has gained Outlook a reputation as a highly insecure e-mail platform.

Unix programmer Bill Joy has suggested that Outlook is insecure largely because it was written in C, making it easy to write programs to exploit it. He also believes the widespread use of Outlook is a major contributing factor in the proliferation of spam.

As part of its Trustworthy Computing initiative, Microsoft took corrective steps to fix Outlook's reputation in Office Outlook 2003. Among the most publicized security features are that Office Outlook 2003 does not automatically load images in HTML e-mails or permit opening executable attachments by default, and includes a built-in Junk Mail filter. Service Pack 2 has augmented these features and adds an anti-Phishing filter.

Note of Interest: