santanuio Posted April 17, 2023 Posted April 17, 2023 Hi, Sending email to any gmail address is failed from mail id created in my account: dev at santanu.io. The mails are delivered properly in other email addresses such as outlook. I receive the following returned email: ========================= This is the mail system at host tommy2.heliohost.org. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <......@gmail.com>: host gmail-smtp-in.l.google.com[142.250.141.26] said: 550-5.7.26 This mail is unauthenticated, which poses a security risk to the 550-5.7.26 sender and Gmail users, and has been blocked. The sender must 550-5.7.26 authenticate with at least one of SPF or DKIM. For this message, 550-5.7.26 DKIM checks did not pass and SPF check for [santanu.io] did not pass 550-5.7.26 with ip: [65.19.141.77]. The sender should visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for 550 5.7.26 instructions on setting up authentication. 21-20020a631955000000b005142038a8c7si11885657pgz.291 - gsmtp (in reply to end of DATA command) ===================
Krydos Posted April 17, 2023 Posted April 17, 2023 SPF, DKIM, and DMARC have been set up for you. I recommend sending a test email to https://www.mail-tester.com/ to make sure everything is set up correctly. If the score is anything less than 10/10 post the report so we can fix any other issues that you might have.
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