FATAL Postman: wp_mail has been declared by another plugin or theme

  • Resolved John

    (@dsl225)


    1 year, 6 months ago

    Hello,

    A site that is using Gmail API since many years without issues suddenly gets this alert:

    Postman: wp_mail has been declared by another plugin or theme, so you won't be able to use Postman until the conflict is resolved.
    More info that may help - /home/getuploa/public_html/ppdesign/wp-includes/pluggable.php:174

    and tons of those errors in the log:

    FATAL Postman: Postman: wp_mail has been declared by another plugin or theme, so you won't be able to use Postman until the conflict is resolved.

    Despite those alerts, all message are being sent out without a problem and a new window in Post SMTP settings suggests this:

    “I recommend to change it and TEST Post SMTP with the value PHPMailer.
    ONLY if the default mailer type is not working for you.”

    but this doesn’t work and emails are not sent out with this setting while everything seems to work fine with current config using Post SMTP as mailer type.

    What should I do?

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