On 08.09.24 13:33, Walter Alejandro Iglesias wrote:
> On Sun, Sep 08, 2024 at 11:56:44AM +0200, Christian Schulte wrote:
>> On 08.09.24 11:10, Walter Alejandro Iglesias wrote:
>>> Slightly off-topic but closely related.
>>>
>>> On Sun, Sep 08, 2024 at 08:55:54AM +0200, Christian Schulte wrote:
>>>> Sorry, if this mail does not show up correctly in the thread. I cannot get mutt
>>>> to authenticate to the gmail account. So I really used vi and sendmail -t.
>>>>
>>>
>>> All the messages you've been answering, in this thread as well as in the
>>> other I opened recently about my mail(1) patches (allegedly sent from
>>> Thunderbird since they show "User-Agent: Mozilla Thunderbird" among
>>> their headers) lack an In-Reply-To header, hence none of them went show
>>> up correctly in the thread (at least in Mutt or Tin.)  In fact this is
>>> the first message of yours which includes a In-Reply-To header.  I'd
>>> appreciate you tell me how you managed to include that header using a
>>> "sendmail -t" command.  (Since you didn't clarify it, I assume that you
>>> used OpenSMTPD.)
>>>
>>>
>>
>> Does this message include a valid In-Reply-To header?
> 
> There is no In-Reply-To header in your messages sent from Thunderbird,
> neither valid nor invalid.

Thank you. Seems I ran into:

<https://bugzilla.mozilla.org/show_bug.cgi?id=1370217>

>   Content-Type: text/plain; charset=UTF-8
>   Content-Transfer-Encoding: 7bit

That is correct and not related to Thunderbird. As long as there are
only 7bit ASCII characters in a mail, the transfer encoding is set
correctly to 7bit.

The next characters (umlauts) will switch that to 8bit automatically.

ÄÖÜäöüß

Sorry for the noise. This isn't a MUA support forum.

-- 
Christian