Delivery Status Notification (Failure)
Delivery to the following recipient failed permanently: oleg.plotnikoff@gmail.com
Technical details of permanent failure:
550-5.7.26 Your email has been blocked because the sender is unauthenticated. Gmail requires all senders to authenticate with either SPF or DKIM. Authentication results: DKIM = did not pass SPF [vejbyif.dk] with ip: [46.183.139.172] = did not pass For instructions on setting up authentication, go to support.google.com/mail/answer/81126#authentication 38308e7fff4ca-331f42d4e57si22183721fa.304 – gsmtp
Technical details of permanent failure:
550-5.7.26 Your email has been blocked because the sender is unauthenticated. Gmail requires all senders to authenticate with either SPF or DKIM. Authentication results: DKIM = did not pass SPF [vejbyif.dk] with ip: [46.183.139.172] = did not pass For instructions on setting up authentication, go to support.google.com/mail/answer/81126#authentication 38308e7fff4ca-331f42d4e57si22183721fa.304 – gsmtp
6888c71e913ae.rfc822-headers