The original message was received at Tue, 23 Feb 2021 13:34:41 -0600 from: webmaster@inkscape.org

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<<< 550-5.7.1 The user or domain that you are sending to (or from) has a policy that <<< 550-5.7.1 prohibited the mail that you sent. Please contact your domain <<< 550-5.7.1 administrator for further details. For more information, please visit <<< 550 5.7.1 https://support.google.com/a/answer/172179 q41si11742836ooh.15 - gsmtp 550 5.7.1 The user or domain that you are sending to (or from) has a policy that 550-5.7.1 prohibited the mail that you sent. Please contact your domain 550-5.7.1 administrator for further details. For more information, please visit 550 5.7.1 https://support.google.com/a/answer/172179 q41si11742836ooh.15 - gsmtp