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SMPT Server Error Mail Delivery Failed - Gmail

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    SMPT Server Error Mail Delivery Failed - Gmail

    V16.1.2 - since adding SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) text to the DNS entries according to Gmail Postmaster Guidance on our site host domain and shop sub-domain we have been getting Mailed Delivery Failed notices on automated online order receipts for customers using Gmail email addresses.

    There is no problem receiving emails with Gmail addresses on enquiries from customers using the contact form on our website.

    The problem occurs when an automated receipt is generated in response to an online order and also when an email is sent using the mail tab on an order after downloading affecting customers only with Gmail email addresses.

    It appears that the html code on the automated order response gets rejected as these emails can be resent separately with text content copied from the mailed delivery failed notices without a problem.

    Any guidance on how to overcome this most welcome.

    Martin Nichols
    Mantra Audio
    Last edited by Mantra; 04-Jan-2022, 09:49 AM. Reason: Extent of problem encountered clarified

    #2
    Originally posted by Mantra View Post
    V16.1.2 - The problem occurs when an automated receipt is generated in response to an online order and also when an email is sent using the mail tab on an order after downloading affecting customers only with Gmail email addresses.

    It appears that the html code on the automated order response gets rejected as these emails can be resent separately with text content copied from the mailed delivery failed notices without a problem.
    I got this one resolved by arranging for an extra SPF text line to the DNS entries to cover the IP range of CGI servers that control the PHP on our domain host platform.

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