Each tor-announce@ mail causes 500-1000 yahoo bounces and mailman never disables the accounts
Every time a tor-announce@ mail goes out, the tor-announce owner gets 500-1000 messages of the form
I'm afraid I wasn't able to deliver the following message.
This is a permanent error; I've given up. Sorry it didn't work out.
And here is what mailman has to say in those mails:
The attached message was received as a bounce, but either the bounce
format was not recognized, or no member addresses could be extracted
from it. This mailing list has been configured to send all
unrecognized bounce messages to the list administrator(s).
I did some spot checking, and (a) the address is indeed a current tor-announce@ subscriber, and (b) eugeni's logs show the mail being successfully delivered to yahoo.
So it would seem that the mail is being delivered properly, and then yahoo is sending us mail on its own afterwards saying that our mail never really got anywhere.
And mailman doesn't know any automated way to handle that mail, which means the address stays subscribed and the process happens again on the next post.
It can't be good for our email reputation to bomb yahoo with thousands of known bad attempts each time. I wonder if there's something to be done to let mailman recognize them properly.