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Mail Delivery system returns messages. Emails to gmail users are being rejected.

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  • 15-05-2022 6:59pm
    #1
    champ1
    Registered Users Posts: 8 ✭


    My computer is an iMac and I use Mac Mail for my email service. I have an eircom.com account configured on Mail and have been using this without problems for years. As I use Virgin Media for broadband, the outgoing mail server is identified as smtp.upcmail.ie on the eircom account. For the past week or two, all emails which I send to gmail users are returned with the following message.

    SMTP error from remote mail server after pipelined end of data:

       550-5.7.26 This message does not have authentication information or fails to

       550-5.7.26 pass authentication checks. To best protect our users from spam, the

       550-5.7.26 message has been blocked. Please visit

       550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more

       550 5.7.26 information. fd11-20020a056402388b00b0042a8fed7b3asi3597398edb.91 - gsmtp

    Reporting-MTA: dns; vie01a-dmta-pe02.mx.upcmail.net


    The problem happens only if the message is addressed to a gmail user.


    Does anyone know why this is happening now, or how I can fix it?


    Thank you, Conor

    Tagged:


Comments

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    #2
    Spear
    Moderators, Computer Games Moderators, Technology & Internet Moderators, Help & Feedback Category Moderators Posts: 25,238 CMod ✭✭✭✭Spear


    This has been going on for a while, Virgin Media's outgoing SMTP server is doing something that Gmail doesn't like. You can't fix this.



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    #3
    Harcourt
    Registered Users Posts: 1 ✭Harcourt


    At 30th May 22. My Eircom email from Outlook bounces when sent to Gmail, BUT if I send from Eircom's Webmail it works fine. In both cases from same PC using Virgin broadband.

    Any help appreciated

    Michael



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