Hoax Clearing Center

This is the Planio mail system at host fsn1-app01.hosts.plan.io.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, you can contact our support team
at support@plan.io or https://plan.io/contact.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The Planio mail system

<naufal6b.251516@gmail.com>: host gmail-smtp-in.l.google.com[74.125.206.27]
said: 550-5.7.26 Your email has been blocked because the sender is
unauthenticated. 550-5.7.26 Gmail requires all senders to authenticate with
either SPF or DKIM. 550-5.7.26 550-5.7.26 Authentication results:
550-5.7.26 DKIM = did not pass 550-5.7.26 SPF [turnbackhoax.id] with ip:
[116.202.71.71] = did not pass 550-5.7.26 550-5.7.26 For instructions on
setting up authentication, go to 550 5.7.26
https://support.google.com/mail/answer/81126#authentication
5b1f17b1804b1-431bd9aaa53si19510455e9.141 - gsmtp (in reply to end of DATA
command)