The technical support email, techsupport@libertystreet.com, returns the following error message.
Mail delivery failed: returning message to sender
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:
libertyst@gmail.com
host gmail-smtp-in.l.google.com [172.253.63.27]
SMTP error from remote mail server after pipelined end of data:
550-5.7.26 This mail 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 [libertystreet.com] with ip: [66.96.189.9] = 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 q23-20020ac87357000000b0042c2ada4b7dsi6324395qtp.749 - gsmtp