错误重定向到自定义URL协议

In my post here, I made mention of having an issue with a custom URL protocol link being sent in an email. I got around that issue by sending a link to a web page, which then did the redirect to the custom URL protocol (presumably the issue with sending the direct link was that Gmail (and possibly other providers) were seeing my protocol as "unsafe" and therefore stripping it out of the email)., I made mention of having an is