Hi guys, just a quick note, to see how I could be getting this error. What is happening is that since novemeber 2014 I have been getting some errors from Yahoo as if my ip is in the XBL list. The XBL for what I know is a listing for ips of machines/ips that are sending email through their home broadband ip/connection, so it doesn't make sense. If I check the ip against SH there is no listing whatsoever, so I assume Yahoo is responding this code due to a problem of theirs, but what triggered it? Does anyone have this false positives? It would be great to solve it since any time I get a SH error code from any TLD my system pauses all sending to any domain, and have to manually reset stuff. Thanks!