Delivery Status Notification (Failure)
Delivery to the following recipient failed permanently: dima.sergeev@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 2adb3069b0e04-553cfa8eb3dsi2318607e87.419 – 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 2adb3069b0e04-553cfa8eb3dsi2318607e87.419 – gsmtp
6854304ea96ea.rfc822-headers