Stephan Krinetzki writes:
Yes, it doesn't matter which cleint they are using. The cutted subject was reported multiple times.
That doesn't tell me that they use different clients, though. Hundreds of millions of people use Gmail, for one. All of them would report the same problem if it occurred, but that could be a Gmail bug.
Of course if you look at the original text and there is no second line, that's a Mailman bug.
And here we are: There is no second line! The subject header only contains the displayed value, no new line or other things. But the mailman subject line is intact. Only the regular Subject: is truncated.
I don't understand what you mean by "mailman subject line" and "regular Subject:". Are you talking about a digest that contains multiple messages? If so, explain more completely what you mean by those terms. It would help a lot if you would forward to us a complete raw message that shows the problem.
Most mail clients have a "forward" function that will do this. A "reply" with the mail quoted does not help very much. A screenshot does not help very much. We need to see some information that is normally hidden by clients and not including in quoted replies.
Steve