On 9/10/2013 8:08 AM, Guido van Rossum wrote:

Why do several posts in this thread have an Unsubscribe link that tries to unsubscribe me from the list? (I saw one by Glen, and another one by Donald Stufft.)

Seems to be in all of them. Probably added by the mailing list software.

Why don't you always see it?

Possibly a combination of being directly listed as a recipient, so that you get a copy not sent through the mailing list, together with an email client that suppresses the duplicates (if the mailing list software doesn't change the Message-Id:). But since heretofore you haven't participated in this thread, if you don't see the Unsub link in all of this thread, I doubt this is the explanation. You message to which I'm replying is the first in this thread that came directly to me and which doesn't have the link, because you addressed me directly. Use Reply-List rather than Reply-All if your MUA supports that.

(Come to think of it, what's the point of having an Unbub link in ever message that goes out?)

To avoid people that accidentally subscribe from asking how to unsubscribe, perhaps.