Re: Small changes to LAU mailing list

Hello Fons,

On 1/5/26 23:07, Fons Adriaensen wrote:
> Oi Mon, Jan 05, 2026 at 09:35:13PM +0100, Jeremy Jongepier wrote:
> 
>> And another change I had to make was that I had to disable the automatic
>> conversion of HTML mails to plain text. I really don't like having to do
>> this but if this prevents users getting disabled or even getting
>> unsubscribed and allows them to receive mail without it getting bounced then
>> so be it.
> 
> I don't follow the logic here (probably my own ignorance), so
> could you explain ?

The issue is that Mailman changes the content of the mail, hence 
breaking the DKIM/DMARC chain. This anti-spoofing measure wants to see 
an unaltered mail the whole line through, it can check this using 
specific digital signatures. The other changes are related to this, 
having Mailman change the subject and add a footer also breaks the 
chain. Not adhering to this anti-spoofing measure means mail from this 
mailing list has a bigger chance of getting bounced or rejected by other 
mail servers with a strict anti-spoofing policy.

> Here anything that is pure HTML is simply deleted before I even
> try to read it, unless there is a good reason to look into it.
> One such reason may be the LA* prefix, which now won't be there...

LAU didn't send HTML mail because it was converted to plain text. Now it 
does and because the [LAU] prefix was removed you will have to use a 
different filtering rule unfortunately to filter out the LAU mail. Some 
examples were already sent to the list. I'm using Thunderbird myself and 
I'm filtering on "From, To, CC or BCC contains 
[email protected]". Hope this helps.

> So I guess I'll be missing some of the future LA* content :-(

Hope not!

> 
> Ciao,
>

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