Feedback from devs that were confronted with the "is not an allowed host"
message shows, that the message is not very actionable. It's not clear why something
that is clearly a legitimate and existing host would be considered "not allowed".
The new error message clearly points at the SSRF policy as the source. Making the
problem more search engine friendly and hopefully allowing admins to better understand
what they have to fix.
Jan Sandbrink
40301c3463