For maximum protection, you should investigate and set all appropriate items. See the bottom of this page for links to information about that and their current recommendation for blacklists etc.
These are:. Real time blacklist filtering is not enabled by default, but you should turn this on. The reason people hesitate to do this is because of false positives, but you can easily white-list those addresses; see Kerio Mailserver Blacklists. A number of free blacklists are pre-configured for you, but you can add others, including of course paid lists. Using these blacklists can immediately cut out a lot of unwanted mail.
Be sure to set blacklists to "Add Spam Score", not block. If you block, you cannot whitelist with "Custom Rules". Whitelisting can be done by IP in the "Custom whitelist of IP addresses" section, but that only affects the Internet blacklists. You can override Spam score in "Custom Rules", but if you block at the black lists, it will never get that far. There's another advantage to adding spam score rather than blocking.
There are many available blacklisting services. Some are free, some are paid, some are good and some are sloppy, but consider this:. If you found an IP address on four different blacklists, the chances of that NOT being a spammer are very, very low. One blackist might be a "false positive". Two starts to get suspicious, but four is almost certain. So if you increased the spam score by just one point for a match from any of them, you hit four instantly for the spammer who has attracted everyone's attention.
Of course you could increase it even more for super-conservative lists like GBUdb , but intelligent use of blacklists can really help block spam. These are two that I use:. Another I added recently is barracudacentral. You need to create an account with them, but it's free. They'll ask for your DNS servers, but what they mean is the IP of the machine s that will be using their service - that would be the IP of your mailserver.
Once you have the account, add them like this:. Finally, consider UCEProtect. They have three levels of lists - I use Level 2 and add 2 points. Some countries generate more spam than others.
If you have no reason to expect any legitimate mail from IP addresses that originate in those countries, why not block those outright or add spam score? You can do that with Custom Blacklists. I put in networks like I add two spam points if the sender matches.
By itself, that isn't enough to be classified as spam, but it gives the message a good head start if it has other spammy characteristics. Attachment filtering is also disabled by default because every company has different needs. If you are a programming house, you may need to accept. If enabled, messages are still delivered assuming the message gets by other content rules , but inappropriate attachments are stripped.
You can optionally warn the sender that the attachment was stripped, and you can also forward the original, with attachment, to an administrative address. You can also define your administrator custom rules at the server, and some clients Webmail, for example can define their own server side rules. Remember that rules defined in Webmail are processed regardless of whether you are using Webmail to read your mail. No wildcards in custom rules, unfortunately. Kerio Connect 7. This lets you add spam points for "viagra" or "mortgage" even if it isn't in the subject line.
Note that you need to look at how such messages are scored use "View source" or "Show original" in your client. Many of these get a negative starting score, so you'd need to be more aggressive to block them.
As an example, I often get email similar to this:. I added some body rules to catch things like this, but the message above isn't enough to be treated as spam - it would need more indicators as we can see in the headers after receiving it.
As of 7. Kerio supports both of these, though at this time they aren't used enough by other servers to be of much value. There's no reason not to turn them on; they could catch something. Don't block though - increase the spam store. Was fixed the displaying of the last few entried of the Active Connections list in Firefox. Also the Active Connections table shows now the column entries when the order is changed.
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Posted December 16, Hello, I have been having an issue recently where uTorrent starts using a lot of CPU up to a full core on a 4 core system and up to 1. Link to comment Share on other sites More sharing options DreadWingKnight Posted December 16, Thanks for the quick reply. Hopefully below is what you need but please let me know if you need more.
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