The response was:
DNS Error: 8018647 DNS type 'mx' lookup of brunofranco.uy responded with code NOERROR 8018647 DNS type 'aaaa' lookup of mx.zoho.com.brunofranco.uy. responded with code NXDOMAIN 8018647 DNS type 'a' lookup of mx.zoho.com.brunofranco.uy. responded with code NXDOMAIN 8018647 DNS type 'aaaa' lookup of mx2.zoho.com.brunofranco.uy. responded with code NXDOMAIN 8018647 DNS type 'a' lookup of mx2.zoho.com.brunofranco.uy. responded with code NXDOMAIN
Final-Recipient: rfc822; xxxx@brunofranco.uy
Action: delayed
Status: 4.0.0
Diagnostic-Code: smtp; DNS Error: 8018647 DNS type 'mx' lookup of brunofranco.uy responded with code NOERROR
8018647 DNS type 'aaaa' lookup of mx.zoho.com.brunofranco.uy. responded with code NXDOMAIN
8018647 DNS type 'a' lookup of mx.zoho.com.brunofranco.uy. responded with code NXDOMAIN
8018647 DNS type 'aaaa' lookup of mx2.zoho.com.brunofranco.uy. responded with code NXDOMAIN
8018647 DNS type 'a' lookup of mx2.zoho.com.brunofranco.uy. responded with code NXDOMAIN
Last-Attempt-Date: Sun, 04 Jun 2017 16:38:46 -0700 (PDT)
Will-Retry-Until: Mon, 05 Jun 2017 14:09:53 -0700 (PDT)