mail not getting through

  • Hi, This form was working perfectly up until a few days ago, when mail began to be returned. It’s set up to send to a Gmail address. This is the error I’m getting:

    A message that you sent could not be delivered to one or more of its
    recipients. This is a permanent error. The following address(es) failed:
    [email protected]
    host gmail-smtp-in.l.google.com [64.233.191.26]
    SMTP error from remote mail server after end of data:
    550-5.7.1 This message does not have authentication information or fails to pass
    550-5.7.1 authentication checks. To best protect our users from spam, the
    550-5.7.1 message has been blocked. Please visit
    550-5.7.1 https://support.google.com/mail/answer/81126#authentication for more
    550 5.7.1 information. a8si18072jao.75 – gsmtp

    I don’t understand how to set up authentication that Google requires with this plugin? I’m using the WordPress mailer, not SMTP. Any suggestions would be welcome.

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  • I don’t know either. Have you looked at the advice Google suggests (in their link).

    DKIM/SPF are a good place to start.

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