Spam Folder: Difference between revisions
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<indicator name="Faults">[[File:Menu-emailadd.svg|link=:Category:Email_Features|30px|Back up to the Email Features Category]]</indicator> |
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You can create some special folders manually to help with dealing with spam. (We used to create these automatically, but do not at the moment.) |
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When connecting to our email service over IMAP we will create a special folder named <code>spam</code> (lowercase). If you delete the spam folder it will be re-created next time you log in. |
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*spam |
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*learnspam |
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*learnham |
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Some email clients recognise this folder as being 'special' and may call is something else, eg our webmail calls it <code>Junk</code> |
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Note that these names are case sensitive. |
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The service will then move messages that has been classified as spam in to this folder. This helps |
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===spam=== |
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⚫ | |||
Messages which the system has marked as spam will be placed |
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that are not spam. |
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in to the spam folder rather than your inbox. -this helps |
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keep your inbox free of spam. |
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==Disabling the spam folder == |
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⚫ | |||
To stop the mail system from putting spam (or any) messages then you can create a Whitelist for your address on the Control Pages. |
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that are not spam. -if you do find such messages, then move then |
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to the learnham folder which is in your Inbox. |
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==Spam 'learning'== |
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If you delete the spam folder, then spam messages will go to |
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your Inbox folder instead. |
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Our spam checking system performs many checks on a |
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===learnspam and learnham=== |
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message to decide whether it is spam or not. One of the |
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checks it can do, is to compare the message with previous |
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messages -this is called Bayesian Learning. |
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==Checking the learning== |
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The special spam folders leanspam and |
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If you view the '[[Email_Viewing_Headers|headers]]' of a message, you should see the spam report, and a line looking like: |
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are folders that you can move messages in to so as to help |
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-3.0 BAYES_00 BODY: Bayes spam probability is 0 to 1% |
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the Bayesian system deal with your email. |
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or perhaps |
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0.8 BAYES_50 BODY: Bayes spam probability is 40 to 60% |
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Here you can see the 'Bayes spam probability' as a percentage. |
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In the first example the Bayes really thinks the message is not spam - it says 0-1%. The second example is less sure about it. |
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==Teaching the system== |
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TEACHING A MESSAGE AS SPAM: |
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If the 'Bayes spam probability' is incorrect, then it can be taught about messages that it has got wrong in the following ways: |
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*Move a message '''OUT''' of the spam folder to tell the system it is '''NOT spam''' |
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*Move a message '''IN''' to the spam folder to tell the system it '''IS spam''' |
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has not marked as spam, then you can move the message to |
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your spam folder. This will get learnt as it's moved. |
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If you make a mistake, just move the message back. |
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You can also move the message in to the learnspam folder |
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for it to get learnt overnight, it will then be moved |
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back to your spam folder once learnt. |
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The process of learning doesn't guarantee that the system will be correct next time a similar message is received, but it should help |
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TEACHING A MESSAGE AS NOT-SPAM (HAM): |
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and you should see a change in the 'probability' in the headers. |
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If you have a message that has been marked as spam, but |
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is not a spam message, then you can do move it out |
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of the spam folder and in to your Inbox and it will be |
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learnt as it's moved. |
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Here is how the look in webmail: |
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[[File:Email-default-folders.png]] |
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(The 'Junk; folder is actually called 'spam', but in this case, Roundcube displays the folder as 'Junk' instead of 'spam'.) |
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==Legacy folders== |
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In the past we used to have a system that used folders called <code>learnham</code> and <code>learnspam</code> - this system is no longer used. These |
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folders can be removed. |
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[[Category:Email Features]] |
[[Category:Email Features]] |
Revision as of 14:09, 20 August 2019
When connecting to our email service over IMAP we will create a special folder named spam
(lowercase). If you delete the spam folder it will be re-created next time you log in.
Some email clients recognise this folder as being 'special' and may call is something else, eg our webmail calls it Junk
The service will then move messages that has been classified as spam in to this folder. This helps keep your inbox free of spam and you should keep an eye on this folder in case there are messages that are not spam.
Disabling the spam folder
To stop the mail system from putting spam (or any) messages then you can create a Whitelist for your address on the Control Pages.
Spam 'learning'
Our spam checking system performs many checks on a message to decide whether it is spam or not. One of the checks it can do, is to compare the message with previous messages -this is called Bayesian Learning.
Checking the learning
If you view the 'headers' of a message, you should see the spam report, and a line looking like:
-3.0 BAYES_00 BODY: Bayes spam probability is 0 to 1%
or perhaps
0.8 BAYES_50 BODY: Bayes spam probability is 40 to 60%
Here you can see the 'Bayes spam probability' as a percentage. In the first example the Bayes really thinks the message is not spam - it says 0-1%. The second example is less sure about it.
Teaching the system
If the 'Bayes spam probability' is incorrect, then it can be taught about messages that it has got wrong in the following ways:
- Move a message OUT of the spam folder to tell the system it is NOT spam
- Move a message IN to the spam folder to tell the system it IS spam
If you make a mistake, just move the message back.
The process of learning doesn't guarantee that the system will be correct next time a similar message is received, but it should help and you should see a change in the 'probability' in the headers.
Legacy folders
In the past we used to have a system that used folders called learnham
and learnspam
- this system is no longer used. These
folders can be removed.