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How do I reject messages which were sent with an empty Mail From Header? |
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This filter is not recommended because most notification messages and some messages from mailing lists are sent with an empty Mail From. To reject such messages you have to create a Content Filter which will match these messages |
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How to Stop Spammers Using Demo/Known Accounts |
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Icewarp Mail Server installs demo accounts during installation. These accounts are set to expire after 30 days but until then, if Icewarp is installed on a production server, these accounts could be exploited by spammers and the like. Basically |
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Why there is an attachment called winmail.dat included in the received mail? |
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This is a feature of older versions of Outlook and Outlook Express. The winmail.dat file contains data to preserve message formatting. Further details can be found in the Microsoft knowledge base at |
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Can I Automate a Global Blacklist for Email addresses |
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The following procedure will allow your Users to add email addresses to a global Blacklist by sending an email Create a new account - e.g. blacklist@yourdomain.com Create a text file with a short path location - example c: |
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How do I block messages which cause Outlook to hang |
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IndicationsOutlook hangs when downloading messages, causing the same message to be downloaded many times in a row and other messages cannot be downloaded. Spammers and hackers have found new ways to harm Outlook users. Both Outloo |
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Intrusion Prevention |
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Intrusion prevention basics |
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Relay if direct delivery fails, redirecting to some destinations if you can’t connect to them via another SMTP (Routing) |
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Relay if direct delivery fails, redirecting to some destinations if you can’t connect to them via another SMTP (Routing) |
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