Hi Claudio,
Here's what I've found out.
Originator can be From, Sender, or Reply-To according to rfc2822 section 3.6.2. Given the variety of ways acs-mail-lite is deployed, and possible fall-back values, it seems reasonable to defer the decision of setting its value to sitewide admins.
Subsequently, a package parameter will be set to the current default, with decision tree for practical fallback values determined by switch. It looks like this could reduce the likelihood of emails originating from OpenACS sites becoming stuck in spam filters.
I'm testing now, and will include with some other edits recently added to head version for next release.
best wishes,
Ben
