[Mailman-Users] Mailman and local user collisions

[Carl Zwanzig]

On 8/12/2016 2:08 PM, Ezsra McDonald wrote:
> I discovered recently that there is a local user and a mailman list with
> the same user at . The mail goes to the list and not the user. What is the
> trick to make Postfix handle these separately?
>
> Lets say the domain is somewhere.com and the list is list.somewhere.com.

If you have joeuser at somewhere.com (local user) and 
thelist at list.somewhere.com with the list-member joeuser at somewhere.com, that 
sounds like correct behavior.

OTOH do you have makemoneyfast at somewhere.com as a personal mailbox and 
makemoneyfast at list.somewhere.com as the name of a mailman list? That's a bad 
idea, in general. Can you even route around that? If they're effectively 
both local users in the same email domain, I'm not sure how it can work, but 
I'm not an expert.  IME attempting to differentiate by a 'list.' subdomain 
or hostname tends to break because people forget that part or it gets 
stripped along the way.

Later,

z!