[Mailman-Users] Automatic subscription based on e-mail subject

Grant Taylor gtaylor at tnetconsulting.net
Fri Feb 1 16:44:58 EST 2019

On 02/01/2019 01:14 AM, R. Diez via Mailman-Users wrote:
> Of course there is the concept of 'Topic' in a mailing list. Mailman, 
> the web interface, or whatever, does know how to group topics together. 
> That is an obvious feature, because people tend to work/participate in 
> threads.

I believe that what Mailman (2) considers to be a "topic" is 
considerably different than what you might consider to be a "topic" or 
"subject" or "thread".

My understanding is that Mailman considers a message to be part of a 
"topic" if the message has one or more key words defined for the topic. 
I.e. any message that has SMTP could be one topic, or DNS be another, or 
Python a third.  This is decidedly NOT the "subject" or "thread" meaning 
of the word "topic" that I think you are using.

What makes this more interesting ~> problematic is that I think Mailman 
doesn't actually scan the message body for the topic(s) / keyword(s). 
Instead, I believe it requires the topic(s) / keyword(s) to be listed in 
the Keywords: header.  -  I know that I've used procmail to scan (copies 
of) messages and add the proper topic(s) / keyword(s) to the Keywords: 
header so that Mailman would see them and use it's topic filter 
properly.  -  This was a LONG time ago and I have forgotten almost all 
of the context.  This may no longer be a requirement for current 
versions of Mailman.

Suffice it to say that Mailman's "Topic" concept is different than 
concept that you and I have for "topic" / "subject" / "thread".

Grant. . . .
unix || die

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