imapnotify

GTK based IMAP mailbox notification application

Imapnotify is an email notification agent written in Python using pyGTK and imaplib2.py (with some local changes that have been submitted upstream). As the name implies, it only works with IMAP servers. It doesn't do POP, mbox, maildir, mh, or anything else.

It is a bit of a memory hog on the surface. On the author's computer monitoring 4 mailboxes, imapnotify as a resident set size of 16MB and a virtual set size of 169M. 9MB is shared with other applications that are using Python and/or Gtk, so in practical terms it's only reponsible for 7MB of physical RAM usage, so it's not all that bad.

Imapnotify uses the IMAP idle command which allows the IMAP server to "push" notification to the client immediately upon arrival of new mail (or deletion of messages). This has two advantages:

1. Much lower CPU usage compared to notifiers such as XFCE's mailwatch panel plugin which opens a new connection for each poll. If SSL encyryption is being used, there is a significant amount of overhead involved in setting up a connection that is then only used to send a single command.

2. Lower latency notification. The user is notified within seconds of new mail being received.

The Imapnotify UI consists of a vertical array of GTK buttons whose labels change color from black to red when new mail is present in the associated mailbox. Labels will be yellow whever imapnotify isn't logged in with the specified mailbox successfully selected. It can also be configured to show the number of unseen messages as tooltips and/or directly in the button labels.

Imapnotify can be configured to monitor any number of mailboxes on any number of servers.

Each button in the UI can be configured to run a shell command when clicked. Assuming the shell command is used to start a MUA, imapnotify will recheck the mailbox status after the shell command terminates.

Configuration is done through a config file and command-line options.

Command line Options

The available command line options are shown below

-h, --help                          show this help message and exit
-l FILE, --log=FILE                 write log to FILE
-v LEVEL, --verbose=LEVEL           verbosity level
-g GEOMETRY, --geometry=GEOMETRY    X11 geometry string
-f FILE, --config-file=FILE         use FILE instead of ~/.imapnotifyrc

On startup, imapnotify will attempt to read a config file from $HOME/.imapnotifyrc or from the path specified with the -f/--config-file option.

Config File

The config file is parsed using the Python standard library's configparser module:

http://docs.python.org/release/2.6.6/library/configparser.html

A section header of Application identifies application-wide settings.

Global Application Settings

• tooltips

  If set to 'yes', the buttons will have tooltips that show how many unseen messages are present. Default is 'yes'.

• showcount

  If set to 'yes', the buttons will show the number of unseen messages in the button labels (when non-zero). Default is 'yes'.

• stick

  If set to 'yes', the imapnotify window will stick to it's place on the root window even when virtual desktops are changed. Default is 'no'.

• decorated

  If set to 'yes', the window manager hints will be set to allow normal window decorations (borders, buttons, etc.). Default is 'yes'.

• keepontop

  If set to 'yes', the imapnotify window will be configured to stay on top of all other application windows. Default is 'no'.

• keeponbottom

  If set to 'yes', the imapnotify window will be configured to stay on top of all other application windows. Default is 'no'.

• desktop

  If set to 'yes', the imapnotify window type hint will be set to 'desktop'. I'm not really sure what that does, but maybe somebody has a use for it. Default is 'no'

• skiptaskbar

  If set to 'yes', the imapnotify window will not appear in desktop manager taskbars. Default is 'no'.

• skippager

  If set to 'yes', the imapnotify window will not appear in desktop manager pagers. Default is 'no'.

• title

  The imapnotify window title. Default is 'IMAP Notifier'.

• alert

  The name of the color to use to indicate the presence of new mail in a mailbox. Default is red. Can be anything accepted by Gtk's window.get_colormap().alloc_color(color_name) call.

• badconn

  The name of the color to use to indicate a failed IMAP connection. Default is yellow. Can be anything accepted by Gtk's window.get_colormap().alloc_color(color_name) call.

Mailbox Configuration Settings

Any section with a name other than Application defines a mailbox configuration. The UI button will have the same name as the section, and the buttons will appear in the same order as the configuration sections in the config file. Mailbox configuration settings are as follows:

• server

  The IMAP server.

• username

  The username to use when logging into the IMAP server.

• password

  The password to use when logging into the IMAP server.

• boxname

  The mailbox name to watch for new mail

• polltime

  The polling period to use if the IMAP server doesn't support push notification via the "idle" command.

• cmd

  The shell command to execute when the button is clicked.

• delayedexpunge

  Set to true if the IMAP server is slow in expunging deleted messages. The issue that this is meant to solve is the case where the user clicks a notifier button starting an MUA, reads or deletes new messages, and exits. Imapnotify will re-check the mailbox status when the MUA exits. On some servers, the status won't change immediately and imapnotify will still see "new" mail that has just been deleted or marked read. Setting delayedexpunge will cause imapnotify to delay for a short while before re-checking the mailbox status after the MUA exits.

• ssl_version

  If set to one of the PROTOCOL_xxx values from the ssl module, this value will be passed to ssl.wrap_socket() call.

• connection_status_only

  If set to 1/on/true the button will not change color/label based on unseen messages -- button will stay black unless connection fails at which time it will turn yellow (as usual).

• newonly

  Button will only change to alert color and show count for unseen messages that do not have the \Old flag set. Tooltip will always show counts of unseen, old, and new.

Here is a sample .imapnotifyrc file that defines two mailboxes to be monitored:

Example Configuration

[Application]
stick = yes
keepontop = yes
decorated = no

[Panix]
username = mypanixusername
password = mypanixpassword
server = imap.panix.com
cmd = aterm -T mutt -n 'mutt panix' -ls -e mutt -F ~/.muttrc.panix
delayedexpunge = yes

[Gmail]
username = mygmailuseranme
password = mygmailpassword
server = imap.gmail.com
cmd = aterm -T 'mutt gmail' -n 'mutt gmail' -ls -e mutt -F ~/.muttrc.gmail