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This paragraph describes how to set up mairix and the back end
nnmairix
for indexing and searching your mail from within
Gnus. Additionally, you can create permanent “smart” groups which are
bound to mairix searches and are automatically updated.
8.2.1 About mairix | About the mairix mail search engine | |
8.2.2 nnmairix requirements | What you will need for using nnmairix | |
8.2.3 What nnmairix does | What does nnmairix actually do? | |
8.2.4 Setting up mairix | Set up your mairix installation | |
8.2.5 Configuring nnmairix | Set up the nnmairix back end | |
8.2.6 nnmairix keyboard shortcuts | List of available keyboard shortcuts | |
8.2.7 Propagating marks | How to propagate marks from nnmairix groups | |
8.2.8 nnmairix tips and tricks | Some tips, tricks and examples | |
8.2.9 nnmairix caveats | Some more stuff you might want to know |
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Mairix is a tool for indexing and searching words in locally stored mail. It was written by Richard Curnow and is licensed under the GPL. Mairix comes with most popular GNU/Linux distributions, but it also runs under Windows (with cygwin), Mac OS X and Solaris. The homepage can be found at http://www.rpcurnow.force9.co.uk/mairix/index.html
Though mairix might not be as flexible as other search tools like
swish++ or namazu, which you can use via the nnir
back end, it
has the prime advantage of being incredibly fast. On current systems, it
can easily search through headers and message bodies of thousands and
thousands of mails in well under a second. Building the database
necessary for searching might take a minute or two, but only has to be
done once fully. Afterwards, the updates are done incrementally and
therefore are really fast, too. Additionally, mairix is very easy to set
up.
For maximum speed though, mairix should be used with mails stored in
Maildir
or MH
format (this includes the nnml
back
end), although it also works with mbox. Mairix presents the search
results by populating a virtual maildir/MH folder with symlinks
which point to the “real” message files (if mbox is used, copies are
made). Since mairix already presents search results in such a virtual
mail folder, it is very well suited for using it as an external program
for creating smart mail folders, which represent certain mail
searches.
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Mairix searches local mail—that means, mairix absolutely must have
direct access to your mail folders. If your mail resides on another
server (e.g., an IMAP server) and you happen to have shell
access, nnmairix
supports running mairix remotely, e.g., via ssh.
Additionally, nnmairix
only supports the following Gnus back
ends: nnml
, nnmaildir
, and nnimap
. You must use
one of these back ends for using nnmairix
. Other back ends, like
nnmbox
, nnfolder
or nnmh
, won’t work.
If you absolutely must use mbox and still want to use nnmairix
,
you can set up a local IMAP server, which you then access via
nnimap
. This is a rather massive setup for accessing some mbox
files, so just change to MH or Maildir already... However, if you’re
really, really passionate about using mbox, you might want to look into
the package ‘mairix.el’, which comes with Emacs 23.
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The back end nnmairix
enables you to call mairix from within Gnus,
either to query mairix with a search term or to update the
database. While visiting a message in the summary buffer, you can use
several pre-defined shortcuts for calling mairix, e.g., to quickly
search for all mails from the sender of the current message or to
display the whole thread associated with the message, even if the
mails are in different folders.
Additionally, you can create permanent nnmairix
groups which are bound
to certain mairix searches. This way, you can easily create a group
containing mails from a certain sender, with a certain subject line or
even for one specific thread based on the Message-ID. If you check for
new mail in these folders (e.g., by pressing g or M-g), they
automatically update themselves by calling mairix.
You might ask why you need nnmairix
at all, since mairix already
creates the group, populates it with links to the mails so that you can
then access it with Gnus, right? Well, this might work, but often
does not—at least not without problems. Most probably you will get
strange article counts, and sometimes you might see mails which Gnus
claims have already been canceled and are inaccessible. This is due to
the fact that Gnus isn’t really amused when things are happening behind
its back. Another problem can be the mail back end itself, e.g., if you
use mairix with an IMAP server (I had Dovecot complaining
about corrupt index files when mairix changed the contents of the search
group). Using nnmairix
should circumvent these problems.
nnmairix
is not really a mail back end—it’s actually more like
a wrapper, sitting between a “real” mail back end where mairix stores
the searches and the Gnus front end. You can choose between three
different mail back ends for the mairix folders: nnml
,
nnmaildir
or nnimap
. nnmairix
will call the mairix
binary so that the search results are stored in folders named
zz_mairix-<NAME>-<NUMBER>
on this mail back end, but it will
present these folders in the Gnus front end only with <NAME>
.
You can use an existing mail back end where you already store your mail,
but if you’re uncomfortable with nnmairix
creating new mail
groups alongside your other mail, you can also create, e.g., a new
nnmaildir
or nnml
server exclusively for mairix, but then
make sure those servers do not accidentally receive your new mail
(see section nnmairix caveats). A special case exists if you want to use
mairix remotely on an IMAP server with nnimap
—here the mairix
folders and your other mail must be on the same nnimap
back end.
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First: create a backup of your mail folders (see section nnmairix caveats).
Setting up mairix is easy: simply create a ‘.mairixrc’ file with (at least) the following entries:
# Your Maildir/MH base folder base=~/Maildir |
This is the base folder for your mails. All the following directories
are relative to this base folder. If you want to use nnmairix
with nnimap
, this base directory has to point to the mail
directory where the IMAP server stores the mail folders!
maildir= ... your maildir folders which should be indexed ... mh= ... your nnml/mh folders which should be indexed ... mbox = ... your mbox files which should be indexed ... |
This specifies all your mail folders and mbox files (relative to the
base directory!) you want to index with mairix. Note that the
nnml
back end saves mails in MH format, so you have to put those
directories in the mh
line. See the example at the end of this
section and mairixrc’s man-page for further details.
omit=zz_mairix-* |
This should make sure that you don’t accidentally index the mairix
search results. You can change the prefix of these folders with the
variable nnmairix-group-prefix
.
mformat= ... 'maildir' or 'mh' ... database= ... location of database file ... |
The format
setting specifies the output format for the mairix
search folder. Set this to mh
if you want to access search results
with nnml
. Otherwise choose maildir
.
To summarize, here is my shortened ‘.mairixrc’ file as an example:
base=~/Maildir maildir=.personal:.work:.logcheck:.sent mh=../Mail/nnml/*... mbox=../mboxmail/mailarchive_year* mformat=maildir omit=zz_mairix-* database=~/.mairixdatabase |
In this case, the base directory is ‘~/Maildir’, where all my Maildir
folders are stored. As you can see, the folders are separated by
colons. If you wonder why every folder begins with a dot: this is
because I use Dovecot as IMAP server, which again uses
Maildir++
folders. For testing nnmairix, I also have some
nnml
mail, which is saved in ‘~/Mail/nnml’. Since this has
to be specified relative to the base
directory, the ../Mail
notation is needed. Note that the line ends in *...
, which means
to recursively scan all files under this directory. Without the three
dots, the wildcard *
will not work recursively. I also have some
old mbox files with archived mail lying around in ‘~/mboxmail’.
The other lines should be obvious.
See the man page for mairixrc
for details and further options,
especially regarding wildcard usage, which may be a little different
than you are used to.
Now simply call mairix
to create the index for the first time.
Note that this may take a few minutes, but every following index will do
the updates incrementally and hence is very fast.
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In group mode, type G b c
(nnmairix-create-server-and-default-group
). This will ask you for all
necessary information and create a nnmairix
server as a foreign
server. You will have to specify the following:
nnmairix
server—choose whatever you
want.
nnml:mymail
.
Just hit TAB to see the available servers. Currently, servers
which are accessed through nnmaildir
, nnimap
and
nnml
are supported. As explained above, for locally stored
mails, this can be an existing server where you store your mails.
However, you can also create, e.g., a new nnmaildir
or nnml
server exclusively for nnmairix
in your secondary select methods
(see section Finding the News). If you use a secondary nnml
server
just for mairix, make sure that you explicitly set the server variable
nnml-get-new-mail
to nil
, or you might lose mail
(see section nnmairix caveats). If you want to use mairix remotely on an
IMAP server, you have to choose the corresponding
nnimap
server here.
mairix
, but you can also choose something like ssh
SERVER mairix
if you want to call mairix remotely, e.g., on your
IMAP server. If you want to add some default options to
mairix, you could do this here, but better use the variable
nnmairix-mairix-search-options
instead.
nnmairix
groups. Choose whatever you
like.
nnimap
or nnmaildir
, you will be
asked if you work with Maildir++, i.e., with hidden maildir
folders (=beginning with a dot). For example, you have to answer
‘yes’ here if you work with the Dovecot IMAP
server. Otherwise, you should answer ‘no’ here.
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In group mode:
Creates nnmairix
server and default search group for this server
(nnmairix-create-server-and-default-group
). You should have done
this by now (see section Configuring nnmairix).
Prompts for query which is then sent to the mairix binary. Search
results are put into the default search group which is automatically
displayed (nnmairix-search
).
Allows you to create a mairix search or a permanent group more
comfortably using graphical widgets, similar to a customization
group. Just try it to see how it works (nnmairix-widget-search
).
Another command for creating a mairix query more comfortably, but uses
only the minibuffer (nnmairix-search-interactive
).
Creates a permanent group which is associated with a search query
(nnmairix-create-search-group
). The nnmairix
back end
automatically calls mairix when you update this group with g or
M-g.
Changes the search query for the nnmairix
group under cursor
(nnmairix-group-change-query-this-group
).
Toggles the ’threads’ parameter for the nnmairix
group under cursor,
i.e., if you want see the whole threads of the found messages
(nnmairix-group-toggle-threads-this-group
).
Calls mairix binary for updating the database
(nnmairix-update-database
). The default parameters are -F
and -Q
for making this as fast as possible (see variable
nnmairix-mairix-update-options
for defining these default
options).
Keep articles in this nnmairix
group always read or unread, or leave the
marks unchanged (nnmairix-group-toggle-readmarks-this-group
).
Recreate nnmairix
group on the “real” mail back end
(nnmairix-group-delete-recreate-this-group
). You can do this if
you always get wrong article counts with a nnmairix
group.
Toggles the allow-fast
parameters for group under cursor
(nnmairix-group-toggle-allowfast-this-group
). The default
behavior of nnmairix
is to do a mairix search every time you
update or enter the group. With the allow-fast
parameter set,
mairix will only be called when you explicitly update the group, but not
upon entering. This makes entering the group faster, but it may also
lead to dangling symlinks if something changed between updating and
entering the group which is not yet in the mairix database.
Toggle marks propagation for this group
(nnmairix-group-toggle-propmarks-this-group
). (see section Propagating marks).
Manually propagate marks (nnmairix-propagate-marks
); needed only when
nnmairix-propagate-marks-upon-close
is set to nil
.
In summary mode:
Allows you to create a mairix query or group based on the current
message using graphical widgets (same as nnmairix-widget-search
)
(nnmairix-widget-search-from-this-article
).
Interactively creates a new search group with query based on the current
message, but uses the minibuffer instead of graphical widgets
(nnmairix-create-search-group-from-message
).
Searches thread for the current article
(nnmairix-search-thread-this-article
). This is effectively a
shortcut for calling nnmairix-search
with ‘m:msgid’ of the
current article and enabled threads.
Searches all messages from sender of the current article
(nnmairix-search-from-this-article
). This is a shortcut for
calling nnmairix-search
with ‘f:From’.
(Only in nnmairix
groups!) Tries determine the group this article
originally came from and displays the article in this group, so that,
e.g., replying to this article the correct posting styles/group
parameters are applied (nnmairix-goto-original-article
). This
function will use the registry if available, but can also parse the
article file name as a fallback method.
Remove possibly existing tick mark from original article
(nnmairix-remove-tick-mark-original-article
). (see section nnmairix tips and tricks).
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First of: you really need a patched mairix binary for using the marks propagation feature efficiently. Otherwise, you would have to update the mairix database all the time. You can get the patch at
http://www.randomsample.de/mairix-maildir-patch.tar
You need the mairix v0.21 source code for this patch; everything else is explained in the accompanied readme file. If you don’t want to use marks propagation, you don’t have to apply these patches, but they also fix some annoyances regarding changing maildir flags, so it might still be useful to you.
With the patched mairix binary, you can use nnmairix
as an
alternative to mail splitting (see section Fancy Mail Splitting). For
example, instead of splitting all mails from ‘david@foobar.com’
into a group, you can simply create a search group with the query
‘f:david@foobar.com’. This is actually what “smart folders” are
all about: simply put everything in one mail folder and dynamically
create searches instead of splitting. This is more flexible, since you
can dynamically change your folders any time you want to. This also
implies that you will usually read your mails in the nnmairix
groups instead of your “real” mail groups.
There is one problem, though: say you got a new mail from
‘david@foobar.com’; it will now show up in two groups, the
“real” group (your INBOX, for example) and in the nnmairix
search group (provided you have updated the mairix database). Now you
enter the nnmairix
group and read the mail. The mail will be
marked as read, but only in the nnmairix
group—in the “real”
mail group it will be still shown as unread.
You could now catch up the mail group (see section Group Data), but this is
tedious and error prone, since you may overlook mails you don’t have
created nnmairix
groups for. Of course, you could first use
nnmairix-goto-original-article
(see section nnmairix keyboard shortcuts) and then read the mail in the original group, but that’s
even more cumbersome.
Clearly, the easiest way would be if marks could somehow be automatically set for the original article. This is exactly what marks propagation is about.
Marks propagation is inactive by default. You can activate it for a
certain nnmairix
group with
nnmairix-group-toggle-propmarks-this-group
(bound to G b
p). This function will warn you if you try to use it with your default
search group; the reason is that the default search group is used for
temporary searches, and it’s easy to accidentally propagate marks from
this group. However, you can ignore this warning if you really want to.
With marks propagation enabled, all the marks you set in a nnmairix
group should now be propagated to the original article. For example,
you can now tick an article (by default with !) and this mark should
magically be set for the original article, too.
A few more remarks which you may or may not want to know:
Marks will not be set immediately, but only upon closing a group. This
not only makes marks propagation faster, it also avoids problems with
dangling symlinks when dealing with maildir files (since changing flags
will change the file name). You can also control when to propagate marks
via nnmairix-propagate-marks-upon-close
(see the doc-string for
details).
Obviously, nnmairix
will have to look up the original group for every
article you want to set marks for. If available, nnmairix
will first
use the registry for determining the original group. The registry is very
fast, hence you should really, really enable the registry when using
marks propagation. If you don’t have to worry about RAM and disc space,
set gnus-registry-max-entries
to a large enough value; to be on
the safe side, choose roughly the amount of mails you index with mairix.
If you don’t want to use the registry or the registry hasn’t seen the
original article yet, nnmairix
will use an additional mairix
search for determining the file name of the article. This, of course, is
way slower than the registry—if you set hundreds or even thousands of
marks this way, it might take some time. You can avoid this situation by
setting nnmairix-only-use-registry
to t
.
Maybe you also want to propagate marks the other way round, i.e., if you
tick an article in a "real" mail group, you’d like to have the same
article in a nnmairix
group ticked, too. For several good
reasons, this can only be done efficiently if you use maildir. To
immediately contradict myself, let me mention that it WON’T work with
nnmaildir
, since nnmaildir
stores the marks externally and
not in the file name. Therefore, propagating marks to nnmairix
groups will usually only work if you use an IMAP server which uses
maildir as its file format.
If you work with this setup, just set
nnmairix-propagate-marks-to-nnmairix-groups
to t
and see what
happens. If you don’t like what you see, just set it to nil
again.
One problem might be that you get a wrong number of unread articles; this
usually happens when you delete or expire articles in the original
groups. When this happens, you can recreate the nnmairix
group on
the back end using G b d.
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I put all my important mail groups at group level 1. The mairix groups have group level 5, so they do not get checked at start up (see section Group Levels).
I use the following to check for mails:
(defun my-check-mail-mairix-update (level) (interactive "P") ;; if no prefix given, set level=1 (gnus-group-get-new-news (or level 1)) (nnmairix-update-groups "mairixsearch" t t) (gnus-group-list-groups)) (define-key gnus-group-mode-map "g" 'my-check-mail-mairix-update) |
Instead of ‘"mairixsearch"’ use the name of your nnmairix
server. See the doc string for nnmairix-update-groups
for
details.
For example, you can create a group for all ticked articles, where the articles always stay unread:
Hit G b g, enter group name (e.g., ‘important’), use ‘F:f’ as query and do not include threads.
Now activate marks propagation for this group by using G b p. Then activate the always-unread feature by using G b r twice.
So far so good—but how do you remove the tick marks in the nnmairix
group? There are two options: You may simply use
nnmairix-remove-tick-mark-original-article
(bound to $ u) to remove
tick marks from the original article. The other possibility is to set
nnmairix-propagate-marks-to-nnmairix-groups
to t
, but see the above
comments about this option. If it works for you, the tick marks should
also exist in the nnmairix
group and you can remove them as usual,
e.g., by marking an article as read.
When you have removed a tick mark from the original article, this
article should vanish from the nnmairix
group after you have updated the
mairix database and updated the group. Fortunately, there is a function
for doing exactly that: nnmairix-update-groups
. See the previous code
snippet and the doc string for details.
As described before, all nnmairix
groups are in fact stored on
the mail back end in the form ‘zz_mairix-<NAME>-<NUMBER>’. You can
see them when you enter the back end server in the server buffer. You
should not subscribe these groups! Unfortunately, these groups will
usually get auto-subscribed when you use nnmaildir
or
nnml
, i.e., you will suddenly see groups of the form
‘zz_mairix*’ pop up in your group buffer. If this happens to you,
simply kill these groups with C-k. For avoiding this, turn off
auto-subscription completely by setting the variable
gnus-auto-subscribed-groups
to nil
(see section Filtering New Groups), or if you like to keep this feature use the following kludge
for turning it off for all groups beginning with ‘zz_’:
(setq gnus-auto-subscribed-groups "^\\(nnml\\|nnfolder\\|nnmbox\\|nnmh\\|nnbabyl\\|nnmaildir\\).*:\\([^z]\\|z$\\|\\z[^z]\\|zz$\\|zz[^_]\\|zz_$\\).*") |
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nnml
server just for nnmairix, but then
you have to explicitly set the corresponding server variable
nnml-get-new-mail
to nil
. Otherwise, new mail might get
put into this secondary server (and would never show up again). Here’s
an example server definition:
(nnml "mairix" (nnml-directory "mairix") (nnml-get-new-mail nil)) |
(The nnmaildir
back end also has a server variable
get-new-mail
, but its default value is nil
, so you don’t
have to explicitly set it if you use a nnmaildir
server just for
mairix.)
nnmairix
groups (put them in
gnus-registry-unfollowed-groups
; this is the default). Be
extra careful if you use
gnus-registry-split-fancy-with-parent
; mails which are split
into nnmairix
groups are usually gone for good as soon as you
check the group for new mail (yes, it has happened to me...).
nnmairix
groups (you shouldn’t be able to, anyway).
nnmairix
groups (though I have no idea what happens if you do).
nnmairix
uses a rather brute force method to force Gnus to
completely reread the group on the mail back end after mairix was
called—it simply deletes and re-creates the group on the mail
back end. So far, this has worked for me without any problems, and I
don’t see how nnmairix
could delete other mail groups than its
own, but anyway: you really should have a backup of your mail
folders.
nnmairix
group,
it is gone for good.
nnmairix
groups, the
“zz_mairix-*” groups will accumulate on the mail back end server. To
delete old groups which are no longer needed, call
nnmairix-purge-old-groups
. Note that this assumes that you don’t
save any “real” mail in folders of the form
zz_mairix-<NAME>-<NUMBER>
. You can change the prefix of
nnmairix
groups by changing the variable
nnmairix-group-prefix
.
A problem can occur when using nnmairix
with maildir folders and
comes with the fact that maildir stores mail flags like ‘Seen’ or
‘Replied’ by appending chars ‘S’ and ‘R’ to the message
file name, respectively. This implies that currently you would have to
update the mairix database not only when new mail arrives, but also when
mail flags are changing. The same applies to new mails which are indexed
while they are still in the ‘new’ folder but then get moved to
‘cur’ when Gnus has seen the mail. If you don’t update the database
after this has happened, a mairix query can lead to symlinks pointing to
non-existing files. In Gnus, these messages will usually appear with
“(none)” entries in the header and can’t be accessed. If this happens
to you, using G b u and updating the group will usually fix this.
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