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Sieve Filtering: Difference between revisions
Interaction between Spam checking and Sieve filtering
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= What is Sieve filtering? =
At a basic level, Sieve is a system whereby the server is given rules
It is helpful if you:
*Use IMAP
*
*Read email from a number of devices
This page explains how to connect to our sieve server using Roundcube or other ManageSieve client software, and gives some examples and also further about Sieve and the features we have enabled
To setup and manage your Sieve filters you would use a program to connect to
{| class="wikitable"
|-
!Server
|
|Enable TLS
|-
!Port
!Username
|Your email address
|
|-
!Password
|your email password
|
|-
!Security
|TLS
|You
|}
[[File:Thunderbird-sieve-tls.png|none|frame|The Thunderbird add-on - You should use TLS for a secure connection]]
==Sieve file limits==
*Maximum script size = 1M
*Maximum number of actions = 128
== Creating Sieve Filters ==
Our IMAP servers run 'ManageSieve', this is a service which clients talk to in order to create and edit sieve filters. ManageSieve runs on port
*RoundCube - our webmail has a Filters option in the settings - We'd recommend this even if you don't usually use webmail.
*[https://
*[https://www.claws-mail.org/plugin.php?plugin=managesieve Extension for claws-mail] (may be packaged as claws-mail-managesieve). Very similar to the Thunderbird extension.
*There are others, take a look at [http://www.sieve.info/clients sieve.info]. You'd use the same server, username and password that you do to access your email, and use port 4910, and TLS.▼
*On Linux, you may find a '''sieve-connect''' package which is a command line tool.
▲*There are others, take a look at [http://
Whatever IMAP email program you use the Sieve filtering will still work. It may be easiest to create and edit the filters using Roundcube webmail even if you don't wish to use Roundcube for reading email.
== Using Roundcube Filters ==
Roundcube will let you create filters using a WYSIWYG style editor - with easy to use drop-down options and so on. You can also edit the sieve code in 'raw' format - select 'Actions', 'Edit filter set' (it's the way to move rules up or down the order).
To create a simple filter to move a few online shop emails in to a folder called shopping:
#Create a new filter set, and then a new filter: [[Image:Rc-filter.png|none|300px|thumb|New filter]]
This will then move emails from these addresses in to a separate folder.
=Sieve Extensions We Don't Support=▼
We don't support the following extensions:▼
*reject▼
**This is because we don't want to have to deal with backscatter and emailing non delivery report messages▼
=Other Sieve Notes=
*When using fileinto: with :create, a new folder will be created if it does not already exist, this is normal. In this case, the new folder will be subscribed to automatically. -You may need to restart your client, or collapse and reopen the folder list (e.g. Thunderbird), for it to notice that there is a new folder that should be listed.
*spam folder: If you have a folder called 'spam' then email which is marked as spam will end up there bypassing any Sieve filters. If you do not wish to happen then rename or delete the folder called 'spam', and add a filter to move spam marked messages to another folder (e.g. junk, rubbish, etc.) '''Update November 2023''': this appears not to be the case - the 'spam' folder is automatically created, but messages are processed by the spam engines, and then passed through Sieve filtering so you can decide what to do with the spam using your Sieve rules. To recreate the previous behaviour (and perhaps extend it a little) you might need a rule like:
require ["fileinto","mailbox"];
if exists "X-Spam-Flag" {
if header :is "X-Spam-Flag" "YES" {
if exists "X-Spam-Bar" {
# 20 OR MORE +
if header :contains "X-Spam-Bar" "++++++++++++++++++++" {
# Can't reject, not supported
fileinto :create "bad-spam";
stop;
}
}
fileinto :create "spam";
stop;
}
}
=Some Examples=
* [[Sieve-Example:Notify|Notify another mailbox when email arrives]]
* [[Sieve-Example:Move email to a folder|Move email to a folder]]
* [[Sieve-Example:Move email to a suffix folder|Move email to a folder based on a localpart suffix]]
* [[Sieve-Example:HTML Autoresponder|HTML Autoresponder]] Automatically reply to incoming email with a HTML formatted email
== Converting From Mozilla Thunderbird to Sieve ==
If you use Mozilla (
#Open your msgFilterRules.dat file in a text editor (notepad, gedit etc.)
#*This file will be found in your 'Local directory', which can be found in Account Settings - Server Setting - look for the 'Local directory' box at the bottom.
#Copy and paste the text in to the [http://
#Install the ThunderBird ManageSieve Addon:
#*Tools - Addons - Search for Sieve, and Install 'Sieve
#Go to Tools - Sieve Message Filters
##Click 'New...'
##give it a name,
##Paste in the results from the converter page
##Check that there are not any errors reported, then click Save.
##Close that tab
#Disable the original Thunderbird filters:
#*Either by closing Thunderbird and renaming the msgFilterRules.dat to something else (
#By default Thunderbird only checks the Inbox for new email, now that email will appear in different folders, we need to tell Thunderbird to check each folder:
##Preferences - Advanced - General - Config Editor (be careful!)
#You can then view the filters via Roundcube webmail, which is easier to edit as it's more of a GUI editor rather than than a straight script editor like the Thuinderbird addon is.
▲=Sieve Extensions We Don't Support=
▲We don't support the following extensions:
▲*reject
▲**This is because we don't want to have to deal with backscatter and emailing non delivery report messages
[[Category:Email Features]] ▼
[[Category:Email]] [[Category:Domains]]▼
[[Category:Sieve]]
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