gmailに送受信できない

gmailに送受信できないのでレンタルサーバーの設定をしてほしい。 Hi. This is the qmail-send program at m35.coreserver.jp. 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. Remote host said: 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 [medicalsports.net] with ip: [202.172.26.36] = 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 bm5-20020a056a00320500b006eaab856030si8921639pfb.86 - gsmtp