Ad placement in outbound mail

Ads need to be able to be inserted in outgoing mail - mail generated by og2list. Other ads will be handled in the forums through regular channels (banner.module or phpAdsNew). Direct mail will be handled through their regular channels (CiviCRM, advuser.module, etc.).

Ads in email: Correct, we need ads to be inserted into each mail – based on criteria we give it (ie. One a day – rotating with other ads – etc.)
* This should be a HEADER ad, not a footer if possible. This is fairly important, as I want our ad to always be seen. The ad should go into individual and digest emails.

--To add an add as the header is no problem. The ads would appear on each message, ie if a digest has 10 mails, the reader would get an add on each of them.

* Ads should be able to be HTML (and RICH MEDIA – i.e. Video – there’s a nice new technique that drops down a video viewer when you hover over the ad.) or default to text for people who turn off HTML viewing.

--HTML is no problem. We send html mails. Usually MUAs that allow users to switch off html will automatically render a plaintext version from the html.

So, we need an administrative area that allows us to select the current ad header for all outgoing messages. The header ad could be plain text or html.

--I will provide what we call a "hook" in Drupal lingo. This hook will then be implemented in another module and its output will be prefixed to outbound mail.

--I will provide a sample module that implements the hook and ads a configurable html snippet as the prefix. More complicated implementations can be based on that.