On 09/13/2013 08:06 AM, Barry Warsaw wrote:
I will leave it to Mark for final decision on this, but my own opinion is that the mm_cfg.py option should stay. cPanel already customizes their Mailman installation, so I think they should set it to Yes when they upgrade their systems to 2.1.16.
I don't feel strongly about this either way except for the general principle of least surprise. Enabling this by default has three downsides that I see. It can render a fully i18n translated General Options page a bit ugly with one relatively large English paragraph; it gives list owners yet another bullet with which to shoot themselves in the foot, and it complicates list configuration by adding yet another decision.
None of these is a deal breaker. I researched the i18n issue, and it turns out only 4 languages currently have a fully translated General Options page. One of these has already been updated and the other 3 are being addressed. Most languages already have between 1 and 3 untranslated strings on this page from prior changes so it could be argued that one more is not important.
The other two considerations are relatively minor, but I still lean towards requiring overt action by the site admin to enable the feature.
I wanted this brought to mailman-developers in the hope that whatever discussion ensued would lead to some consensus.
I confess, I'm not at all up to speed on DMARC. Franck has assured me that this feature can be useful even in the absence of the DNS and MTA changes necessary to DKIM sign outgoing list mail, but it seems to me that enabling author_is_list will almost guarantee that any incoming DKIM signatures will be broken (the From: is almost certainly included in the signed headers) which will cause problems if the outgoing mail is not signed with a valid DKIM signature.
Also, it seems that an installation would want to validate in some way incoming mail before taking responsibility, even in a minor way, for resending it.
All of this leads me to think that making this available to list owners should be an installation decision rather than being done by default.
Please help me understand if I'm wrong.
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan