Rules Wizard and Assistants
Understanding the Safe and Blocked Senders lists |
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How many addresses can the safe and blocked lists hold? Approximately 2000 total. This is because the total size of all lists combined cannot exceed 512K. Once the 512K limit is reached, Outlook alerts you and additional addresses aren't saved until you remove some from the list. For example, if you have 1800 addresses on the safe list, you can only block approximately 200 addresses. If the addresses are long, your list will hold fewer addresses; if they're short, you'll be able to have more. Importing a list of blocked addresses from an older version of Outlook is not recommended, in part because these lists often are larger than 512K and Outlook crashes when trying to import them, but also because spammers change addresses so often that lists are outdated within a few months. Microsoft imposed the limit to improve performance, as the lists are stored as a hidden property in the Inbox and duplicated to the local registry. Each time the users synchronize with the Exchange mailbox store, the lists are downloaded. The limit can be adjusted on Exchange server, by adding a new registry key value to the following registry key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeIS\ParametersSystem\ Add a new DWORD value of Type Max Extended Rule Size and edit the Value Data, entering the maximum size (in bytes) you want to allow. If Outlook's Junk email filter doesn't offer enough options, misses too much spam, or you need better Safe and Blocked lists, try one of the many excellent third party anti-spam filters available. For a list of third party tools, visit http://www.slipstick.com/rules/junkmail.htm#tools For Exchange server junk mail filtering tools, visit http://www.slipstick.com/addins/content_control.htm |
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"Is there a way to add a group of selected junk e-mail from the
inbox to the blocked senders list all at one time instead of one
junk e-mail at a time?" The short answer is simply No. The long answer is that while it seems like a really stupid move by Microsoft not to include this functionality, or the often requested ability to train the filter, they have an excellent reason for not including these options. Microsoft believes that users should not have to touch the filters period. Any antispam solution should be automatic and good enough to catch most spam, because as we've learned over the years with antivirus software and Windows updates, users aren't very good at keeping their programs updated. It also takes time to tinker with antispam settings and filters, time better spent doing anything but configuring the filters. If the filter is designed right, only a few addresses will need to be added to any of the lists - such as addresses belonging to people you don't want to correspond with or whose messages are mistakenly classified as spam. In fact, adding every address that is used the send spam to the list will result in a long list of names, many of which will never send you another message. In addition, you are limited to approximately 2000 names on all of the lists combined and would need to spend a lot of time culling the list. (See Outlook 2003's Safe and Blocked Senders Lists for more information on the size of the lists.) Your goal should be to have a Safe senders list longer than your Blocked senders list. If you need to spend minutes each day (or following each mail pass) adding addresses to your Blocked list, then your Junk Email settings are too low, you don't have the latest filter update, or you need a better spam filter than the one provided with Outlook. Businesses should filter out the spam on the email server, removing spam long before the messages are downloaded to their users desktop. How long are my lists? My Safe Senders and Safe Recipients lists contain 24 addresses and domains, while the blocked senders list contains just two addresses. Using the newest junk filter update for Outlook 2003, almost all of the spam I receive is removed from my Inbox. Outlook 2003 Junk E-mail Filter update: September 14, 2004 http://support.microsoft.com/?id=870765 |
More Information |
For more information on Junk email filtering, see Rules and tools to filter junk mail in Microsoft Outlook Much of this content was originally published in our Exchange Outlook Messaging newsletter: Outlook 2003's Safe and Blocked Senders Lists Using Outlook's Blocked and Safe Senders lists |
