Error: You must provide at least one recipient email address.

  • Resolved clgm

    (@clgm)


    4 months, 3 weeks ago

    Hi, I followed each step in the Setup Wizard for the WP Mail SMTP plugin, using SendGrid as the SMTP Mailer. The domain has been authenticated in Sendgrid. When the Wizard tries to send a test email, something prevented that from working.

    This is the message I’m seeing:

    An issue was detected.

    This means your test email was unable to be sent.

    Typically this error is returned for one of the following reasons:

    • Plugin settings are incorrect (wrong SMTP settings, invalid Mailer configuration, etc).
    • Your web server is blocking the connection.
    • Your host is rejecting the connection.

    Recommended next steps:

    1. Triple-check the plugin settings and consider reconfiguring to make sure everything is correct. Maybe there was an issue with copy&pasting.
    2. Contact your web hosting provider and ask them to verify your server can make outside connections. Additionally, ask them if a firewall or security policy may be preventing the connection – many shared hosts block certain ports.
      Note: this is the most common cause of this issue.
    3. Try using a different mailer.

    This is the error log:

    Versions:
    WordPress: 6.5.5
    WordPress MS: No
    PHP: 8.2.19
    WP Mail SMTP: 4.0.1

    Params:
    Mailer: sendgrid
    Constants: No
    Api Key: Yes

    PHPMailer Debug:
    You must provide at least one recipient email address.

    Debug:
    Email Source: WP Mail SMTP Mailer: SendGrid You must provide at least one recipient email address.

    I’ve triple-checked everything and also contacted the web hosting provider, and haven’t found a solution. I’ve used this same setup on many other websites, without any trouble.

    Are you able to tell where the problem is, please?

Viewing 5 replies - 1 through 5 (of 5 total)
  • Plugin Support Darshana

    (@darshanaw)

    Hi @clgm,

    Thanks for reaching out, and I apologize for the trouble!

    The error message indicates that your recipient email address is incorrect or you are trying to send an email without a recipient email.

    When you get a chance, could you please try sending a test email via the WP Mail SMTP -> Tools page and see whether you can send a test email? If so, you need to check your WordPress administrator email address under the WordPress Settings -> General area.

    I hope this helps. Thanks!

    Thread Starter clgm

    (@clgm)

    Hi Darshana thanks for your reply. The above error happens both when the Launch Wizard tries to send a test email, and when I try to send a test email via the?WP Mail SMTP -> Tools page. The WordPress administrator email address under the WordPress?Settings -> General?area is my email address.

    I am having this same issue when trying to send an autoresponder email with Elementor forms.

    Me too!

    Thread Starter clgm

    (@clgm)

    OK, I have found the cause of the problem on our site: the WP Gardmail plugin was installed on the site previously, and although it was deactivated and deleted from the admin interface, the data were still in the site database and causing an incompatibility issue with the WP SMTP plugin.

    Removing WP Gardmail from the back end has fixed the issue for us.

Viewing 5 replies - 1 through 5 (of 5 total)
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