このメールはシステムからの自動送信メールです。
このメールは送信できませんでした。
Hi. This is the mail program at ns.itscom.net. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out.
hyodo.totoro@gmail.com: host gmail-smtp-in.l.google.com[172.217.221.27] 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 [ml.deaf.tokyo] with ip: [175.177.155.35] = 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 d9443c01a7336-2c9fc1174c4si50553295ad.7 - gsmtp (in reply to end of DATA command)