Mailman host_name setting


I would like to hear if anybody here has tried changing the host_name setting in mailman (General Options, Additional settings) from to just

I just tried and it seems to have the intended effect: Mailman uses instead of as the sender domain when subscribing. Because of the convenience addresses automatically set up when making a new list at DreamHost, replies to the administrative mails works too, at least I could subscribe.

But is it supported? If it works, then why isn’t this the default setting for new lists?

Thank you for any insights!