Note change from Mailman [2] Users to Mailman Developers.
Mark Sapiro writes on Mailman-Users@python.org:
On 3/3/20 2:25 AM, Bernie Cosell wrote:
It seems very explicit that the explicit reply address is singular.. would making it e1@x.com, e2@y.com work?
It won't work. The code uses email.utils.parseaddr() which accepts various display-name and address formats, but only one address. 'e1@x.com, e2@y.com' will result in only 'e1@x.com' in the Reply-To:.
I think we should check if this is the same in Mailman 3, and change it if it is. If we have an attribute whose main function is to populate a header field, it should accept any valid value for that field (POLA). Unless there's a Very Good Reason[tm], in which case "Errors should never pass silently." :-)
Steve