Hi all 

I have been asked by one of our list members about why the addressing of list 
messages he receives varies and he likes to know why. 

Some messages come with the following headers: 

From: Sender Name via Listname <listn...@domain.com>
To: listn...@domain.com
Cc: Recepient Name <addr...@otherdomain.com>

Other messages (on the same list, same recipient): 

From: Sender Name  <<realaddr...@thirddomain.com>>
To: Listname <listn...@domain.com>
(and no Cc: header)

My questions - just to understand it, since the list seems to work perfectly:

1) What does cause this different addressing
2) How does the receiving mail server know where to deliver the message when 
there is no Cc: field in the headers and the list address in the To: field? 

In case it is important: Mailman 2.1.33 on cPanel. 

Thank you, Christian 

-- 
Christian Buser, Hohle Gasse 6, CH-5507 Mellingen (Switzerland)      
Hilfe fuer Strassenkinder in Ghana: https://www.chance-for-children.org
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