On Fri, 2025-12-12 at 08:42 +1100,  wrote:
> > > Thunderbird doesn't appear to give me that option, but for this mail it
> > > gave me "Reply List" as the top option in a list, where the other two
> > > entries were "Reply All" and "Reply".
> > 
> > There's a certain amount of automation involved with this, and some
> > mail clients offer user overrides and customisable default choices.
> > 
> > When I post to someone, my message comes from a "from" address, and
> > that's where replies will go.


Stephen Morris
> Thunderbird offers two columns in it configuration, a "Correspondents" 
> column and a "From" column, and I noticed with mails on this list they 
> are not necessarily the same. For example, with my mails on the list, 
> "Correspondents" showed "Community support for Fedora Users" as a lot of 
> mails on the list do in both columns, and, "From" showed my name, so 
> I've removed the "Correspondents" column and replaced it with "From".

I recall "correspondents" meaning it automatically handles showing you
a TO or FROM address, for those times when you have some common folder
that's not a dedicated inbox or outbox.


> Thunderbird sets the "To" line to whatever address it is sending the 
> mail to. So with your reply it says it is sending the mail to your mail 
> address you have indicated is potentially not monitored (which is not an 
> issue) and the list address.

Interesting that it should do that.  List mail has a reply-to header,
which should set the TO address to the list.

Yes, that mailbox actually does auto-delete mail to it except for some
specific exceptions.  I was rather surprised I was able to set up an
email account actually called that.  I thought it might be a disallowed
email address, or already taken.

Still, it does a good task of killing spam getting to me.


> I think my mails have that list-id header, but I thought that was 
> because the list was adding the list-id header to mails, because I'm not 
> doing that explicitly myself, and I wouldn't have thought Thunderbird 
> would be doing it because of mails on the list not causing Thunderbird 
> to offer the "Reply to List" option.

It's the list server that does it.  The headers identify the mail as
list mail, and which list, etc.  As well as allowing contacting list
owners, it allows you to filter mail belonging to a list (by that
header alone), and it allows mails servers to know that this is list
mail and it may be able to place a lower priority on passing it through
versus other mail when the server is busy.  Mail servers could do
different kinds of spam checking on list mail, if they wanted, or make
allowances for known addressing issues, if they wanted to.


> > The list headers can be used for sorting mail, as a better way of
> > sorting mail into folders (only the actual list mail would go into a
> > folder, and any private mail you got from someone would not).

> I've set up a rule in Thunderbird to move mails into a folder where the 
> "List-ID" and the "From" tags specify the list mail address domain.

It should only be necessary to to use list-id by itself, all mail going
through the list server should have that header.

There is a problem with filtering mail by some headers, you can filter
mail that didn't actually come from the list, into a folder for that
list, and believe that it did come from the list.

That used to happen when people filtered by subjects, and lists were
jamming a prefix in the subject line for their list name.  Someone
could reply privately to you but you thought it was public because of
where you found the message, then someone gets upset.


> > And they can also be used by mail programs for them to decide what
> > their "reply all" or "group reply" function does by default (while
> > usually allowing the recipient to override the action).  For non-list
> > mail, it may reply to all the addresses in "to" and "cc" fields, for
> > when someone is mailing a bunch of people directly without using a list
> > server (such as staff meetings in a small organisation).  For list
> > mail, it may change the behaviour to do what lists expect (respond to
> > just the reply-to address, or a list address.

> Thunderbird seems to be replying to all addresses if I use "Reply All", 
> which is what it does for your mails, with your personal mail address 
> being the first in the list.

The reply-all was always a confusing function.  If you received a group
mail addressed TO a bunch of people (such as how some small social
clubs do their member mail), you'd be replying to all of them.  And
some mail clients treated the CC field differently than the TO field,
but you'd expect your reply to go to all recipients.


> 
> I'm specifying the CC because in F42 when I switched to the gmail 
> account rather than my ISP's account I wasn't getting any mails I sent 
> to the list being echoed back to me via the list, I raised an issue with 
> the moderator on the replied not being echoed and that was rectified,

Hmm, if your list mail account was the same, and just had the address
changed, I wouldn't expect options to change, too.  On the other hand,
if it's a new account replacing the old one, I can imagine various
options might be different.

I'd be a bit suspicious of them disappearing due to some anti-spam
system not liking some aspect of their construction.

-- 
 
uname -rsvp
Linux 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 x86_64
(yes, this is the output from uname for this PC when I posted)
 
Boilerplate:  All unexpected mail to my mailbox is automatically deleted.
I will only get to see the messages that are posted to the mailing list.
 

-- 
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