host mx6.mail.icloud.com [18.104.22.168]
SMTP error from remote mail server after MAIL FROM:firstname.lastname@example.org SIZE=2369:
550 5.7.0 Blocked - see https://support.proofpoint.com/dnsbl-lookup.cgi?ip=22.214.171.124
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
host mx3.hotmail.com [126.96.36.199]
SMTP error from remote mail server after MAIL FROM:email@example.com SIZE=2214:
550 SC-001 (SNT004-MC11F16) Unfortunately, messages from 188.8.131.52 weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.
It looks like you're new here. If you want to get involved, click one of these buttons!