never seen a 400 error like this

HTTP/1.0 400 Bad request Server: ATLAS Platform Content-Type: text/html Content-Length: 246 (effective URL => "http://delta.com/")
2019-04-30 18:27:29 +02:00 · 2019-04-30 18:27:29 +02:00 · 9d623088e7
parent 772fb9cd1d
commit 9d623088e7
1 changed files with 1 additions and 0 deletions
--- a/not_cloudflare/list_customerror.txt
+++ b/not_cloudflare/list_customerror.txt
@ -58,6 +58,7 @@ croplife.ca
 davidmburke.com
 dcleak.com
 delivery.acm.org
+delta.com
 demorgen.be
 digicert.com
 digitalenvelopes.email