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A monkey patch to send MailHost messages to standard out

Project description


This is a hack. :)

This product, when installed, will check if Zope is running in debug mode, and if so, monkey patch (that is, grab the internals of, squeeze tight, then rip hard, just like monkeys do) Zope’s MailHost class, meaning that any and all uses of a MailHost will be “fixed” so that instead of sending mail, it prints messages to the standard output.

This is useful if you don’t have a local mailhost for testing, or if you prefer not to spam the crap out of yourself whilst finding out if your bulk mail script is working.

If Zope is not running in debug mode, it will not install itself. However, I wouldn’t recommend putting it on a production site. You never know what those monkeys may get up to…

You can optionally enable the PrintingMailHost with an environment variable as of version 0.3. See the installation instructions for more information about how to use it.


Martin Aspeli <optilude (AT) gmx (DOT) net>
Initial idea, release management


Dorneles Tremea <deo (AT) plonesolutions (DOT) com>
Fixed to work both with old-style and new-style classes. Extended to also patch SecureMailBase from SecureMailHost, if available.

Clayton Parker <clayton (AT) sixfeetup (DOT) com>

Products.PrintingMailHost Installation

To install Products.PrintingMailHost into the global Python environment (or a workingenv), using a traditional Zope 2 instance, you can do this:

Alternatively, if you are using zc.buildout and the plone.recipe.zope2instance recipe to manage your project, you can do this:

  • Add Products.PrintingMailHost to the list of eggs to install, e.g.:

    eggs =
  • If you want to enable PrintingMailHost when debug-mode is off:

    environment-vars =
  • If you want to disable PrintingMailHost when debug-mode is on:

    environment-vars =
  • Re-run buildout in order to make any of the above changes active:

    $ ./bin/buildout


0.4 (2009-07-24)

  • Rough support for multipart email messages [iElectric]

0.3 (2009-03-22)

  • Decode base64 encoded email messages [claytron]
  • Added environment variable (ENABLE_PRINTING_MAILHOST) to enable or disable PrintingMailHost [claytron]
  • Update README and HISTORY.txt [claytron]

0.2 (2008-08-20)

  • Release as an egg to PyPi [claytron]


  • Updated to use the new standard log mechanism: logging.getLogger. Reformated messages/docstrings. [dtremea] (2006-03-17)
  • Extended to also patch SecureMailBase from SecureMailHost, if available. [dtremea] (2005-10-23)
  • Fixed to work both with old-style and new-style classes, as in the later, dict is a ‘dictproxy’ instance, which doesn’t have the setitem method. Bumpped version. Noted changes. And clean up whitespaces, of course… ;-) [dtremea] (2005-10-23)
  • Initial creation/release [optilude] (2005-04-05)


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