Hi, I found a dns server "in the wild" with answers only if edns0 is deactivated: dig MX dopler.com.cn @ns7.dns.net.cn. -> "FORMERR" dig +noedns MX dopler.com.cn @ns7.dns.net.cn. -> NOERROR and answer Does pdns_recursor automatically fall back to "no edns"? Thanks Thomas