2008 / SSID-based SMTP server changer for Evolution

SSID-based SMTP server changer for Evolution

This is a simple Python script that utilizes gconf and NetworkManager (via D-Bus) to check which wireless network (SSID) you are currently connected to, and updates Evolution's accounts list (in gconf) to point to the correct SMTP server for that network.

This should come in handy when you roam between two (or more) wireless networks and these networks are connected to different ISPs. In my case, these are aon and Silver Server, and sending e-mail from each network only works when the ISP-specific SMTP server is configured in the sending e-mail settings for each account.

On Maemo, we already have this setting (you can specify the SMTP server based on the SSID of the wireless network, and the Internet Tablet knows how to send E-Mails). I've filed a bug report (Bug 510909: Default SMTP server based on NetworkManager SSID) against Evolution in Gnome's bug tracker, but got no reaction so far.

Update 2008-11-06: Lorenzo Milesi discovered that the D-BUS API of NetworkManager has changed in version 0.7. This means that this script does not currently work. Lorenzo is looking for updated API docs, so we can update this script.

Here is some information about API changes from Dan Williams about the new API.

Usage

You can start the script by running python evolution-smtp.py, but you probably want to configure it first. You should run python evolution-smtp.py --identify to show the current SSID and SMTP server, and you can copy the given line directly to the script, i.e. into the MY_NETWORKS dict. Don't forget to remove the examples in the script ;)

When you are at another location, set the correct SMTP settings in Evolution and re-run the "identify" command to give you the correct line for this network, and also add it to the dict. After you have set up all your networks and SMTP servers this way, you simply run the script (python evolution-smtp.py) and it will check if the SMTP server settings need to be updated and give you a (hopefully) clear notification what has been done or what went wrong :) If the variable RUN_AS_DAEMON is set to True, evolution-smtp will continue to run in the background and will re-run whenever NetworkManager's interface status changes.

What works

  • Specifying an SMTP server (+advanced settings, like SSL, TLS, etc..) per SSID
  • Specifying a fallback SMTP server when not connected to wireless (i.e. wired)
  • Running as background process/daemon, watching for network and account changes

What doesn't work

  • No GUI to configure (have to use "--identify" and add SMTP/SSID pairs to script)
  • Specifying which accounts to update the SMTP server for (currently, all are updated)
  • Changin SMTP server based on wired network properties (i.e. assigned IP, etc..)

Download

License

  • BSD-style (see the source file)

Dependencies

  • python (tested w/ Python 2.5)
  • python-gconf
  • python-gobject
  • python-dbus
  • python-pynotify
  • python-xml (or at least xml.dom.minidom)
  • NetworkManager
  • Evolution

Helpful links to library documentation


Thomas Perl (m at thp io), jabber: thp@jabber.org