In Messaging Gateway (SMG) 10.7.5 and earlier the Request Removal link for IP addresses on the Global Bad Senders list as shown on the Reputation > IP Reputation Lookup results page points to an insecure http link to an invalid URL.
The IP investigation page was moved before an update to the SMG Control Center web application was made.
This issue has been addressed with the Messaging Gateway 10.8.0 release.
Please use https://ipremoval.sms.symantec.com/ to request removal.