@arasbm For a 100 posts you can simply use the google groups' rss feed. Here's a post on stackexchange that explains how.
Unfortunately I could not find a way to page the feed so if you have more than a 100 posts this probably wont work.
What I did:
Registered here with Github (social registration).
I get automatically logged in.
I directly went to my profile.
Changed Username and Email (taken from Github).
Now I saw the popup telling me that I still didn't confirm my email address.
Checked my newly entered mailadress... nothing.
Checked the mailaddress which came from Github. Yes a confirmation mail.
Clicked on the link. "Invalid confirmation link".
I needed to resend the confirmation email manually before I could post.
What behaviour I would like to see:
When I change my email address I need to get a new confrmation mail automatically (Opt-In active).