Sorry for being late, but I'll have to work during the day. ;)

Am 16.01.2013 03:23, schrieb Cor Bosman:
> On Jan 15, 2013, at 7:06 PM, Michael Heydekamp <[email protected]> wrote:
>> Am 15.01.2013 22:05, schrieb Cor Bosman:
>>
>>> But why are you saying roundcube is the one adding it?
>>
>> Because it's a fact. See previous test mails.
>>
>>> I dont see it in your replies.
>>
>> Sure, because unlike other users, I don't set any Reply-To: (and therefore
>> "Mail-Reply-To:") at all.
> 
> If I use the latest git, things seem ok-ish. On the message you titled
> 1.2, if I reply in rc it goes to the sender (you).  In OSX Mail this is
> different though, with Reply it goes to sender+list.

And this is what Roundcube should do too, IMO.

1.2 is the same scenario as in the message of Philip Rhoades: List address
plus personal address in the "Reply-To:" header, personal address only in
the "Mail-Reply-To:" header.

> With Reply-All, in rc it goes to either sender+list, or the list alone.

Hmm, I don't understand the either-or (when does the "either" apply, when
the "or"?).

Here, Reply-All goes to the list only in scenario 1.2 (also latest git).
Which is even more strange, as a Reply-All should go to ... uh ... all?

> In OSX mail it goes to sender+list.

Again, this is what Roundcube should do too, IMO.

> Just always use Reply-All for lists, and you're good to go?

Well, not exactly, as even a Reply-all doesn't go to all (see above). Just
test it on Philip's message or on mine (scenario 1.2). But let's first
analyze what's really happening here:

1) Being aware, that a mailing list will add it's own address to the
"Reply-To:" header, the Roundcube user is entering his personal address in
the Reply-To field under Settings/Identities. The user's intention
apparently is that any reply to his message should go a) to the list, AND b)
to him personally.

2) Roundcube creates two headers: "Reply-To:", plus a copy of it to
"Mail-Reply-To:". The user is not even aware that RC does create this
additional "Mail-Reply-To:" header, he can't even see it by default in
Roundcube.

3) Mailman (the mailing list software) receives the message and - as
expected - does add the list address to the "Reply-To:" header. It does that
because it wants to make sure that any reply to the message will (also and
at least) go the list, by preserving the user's intention to receive any
reply also to his personal address. It does NOT add the list address to the
"Mail-Reply-To:" header - most likely because it's simply not aware of the
existence of this non-standard header, nor does Mailman know, how it will be
handled in this or that MUA (you described the differences between RC and
OSX Mail above yourself).

So now we have the scenario 1.2 above: List address plus personal address
in the "Reply-To:" header, personal address only in the "Mail-Reply-To:"
header. But the user doesn't have any chance to convince Mailman to add the
list address to the "Mail-Reply-To:" header as well.

4) The mail is being delivered to all list subscribers. Now all Roundcube
users have to face the following behaviour:
a) A Reply goes to the sender only.
b) A Reply-All goes to the list only.

There is apparently and currently no way with Roundcube to follow the
intention of the user and Mailman: To send a reply to both a) the list and
b) the sender.

And the reason is that Roundcube does ignore the "Reply-To:" header, if a
"Mail-Reply-To:" header does exist as well. But can we really expect that
every Roundcube user is aware of this this behaviour?

I'd say, we can't. Most users have not even heard of the term "header" at
all.

Hope I've clarified some things now. (At least you were suspicious that
Roundcube does add the "Mail-Reply-To:" header, right?) ;)

Cheers,
-- 
Michael Heydekamp
Co-Admin freexp.de
Düsseldorf/Germany
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