A few months ago, someone who knew how to contact me directly told me that she had tried to contact me via Rubberslug feedback, and it looked like I was ignoring her. I actually had received no feedback e-mail.
I unwisely forgot about this incident for several months, until I was updating my gallery, and decided to try sending feedback to myself. Sure enough, nothing arrived, even when I trie dtwo different e-mail addresses on my personal ISP.
When I switched my profile to suing my work e-mail, the feedback that I sent to myself arrived.
I switched back and forth a few times, and my personal ISP reliably, silently, ate all Rubberslug feedback, did not even out it into the Spam folder. My work e-mail reliably accepted Rubberslug feedback.
I am guessing that anything who has e-mail at AT&T Worldnet (anyone who's address is "someone@att.net" or "someone@worldnet.att.net") is not ever receiving Rubberslug feedback.
The feedback is most likely being bounced back to Rubberslug, but because the Feedback interface has no way to see bounces, all such Feedback is being silently ignored and lost.
AT&T Worldnet thinks that they are smart and cute by bouncing e-mails from "known" spam sources, but in reality they are actually stupid and ugly sometimes. For a while, they actually had my work e-mail (a secure, military contracting site) blocked as "a known source of spam".
Rubberslug now seems to be a victim of AT&T's cluelessness, and probably has been for several months at least.
The AT&T Worldnet system also controls e-mail for ameritech.net, bellsouth.net, flash.net, pacbel.net, nvbell.net, prodigy.net, sbcglobal.net, snet.net, swbell.net, and wans.net; AND, in addition, they have formed some kind of a tie-in to Yahoo that I don't completely understand.
So there is probably a lot of Rubberslug feedback that is getting lost due to a bad Spam Blacklist somewhere, that the AT&T e-mail system has bought into....
There are many additional domains that are blocking RS feedback besides the ones you listed - people thought I was ignoring them too. :) My main email is at insight.rr.com, and feedback to those addresses (and maybe all rr addresses) just gets eaten by the ether. I had to switch my feedback to a hotmail account to actually get messages again.
