[Mailman-Users] Mailman and Thunderbird

Christian F Buser luscheina at yahoo.de
Wed Apr 20 04:14:53 EDT 2016

Hi all 

I have no idea where this question belongs to... but there might be some knowing person out here, I hope!

We switched our lists to a new provider and now are using Mailman 2.1.20 from Cpanel. 

A user complained that his Thunderbird mail application (on MacOS X, if this matters) does no longer treat incoming list mails properly - means, the message is treated by Thunderbird as if it was sent to his "default" mail address (we call it "A" for now) instead of the address he used to subscibe to the list (address "B").

This would not be a big problem - but when he replies to a list message, the reply is sent from "A" instead of "B", resulting in an error message from Mailman...

He has analysed the headers and compared with the old list setup headers. As far as he could see, the only difference was that Mailman list includes an "Envelope-To"-header with his subscription address, while the precious list version included a "Delivered-To"-header. 

I am not a "mail header specialist", but I would guess that these two headers are added by the receiving mail server and not by the list software. Is this assumption correct? If not, can Mailman be configured to send the "Delivered-To"-header? 

And if there are by chance any Thunderbird-specialists among us: what can he do to correct the situation? 

Thank you, Christian 

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

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