cannot send test email with word fence firewall on

  • Resolved Visual Vision

    (@visualvision)


    2 months, 3 weeks ago

    Hi there,

    I believe this should be an easy fix, but since I’ve been trying to solve it for quite some time and have tested various approaches, I thought I’d better reach out for help.

    Here’s the issue: when the Wordfence firewall is enabled, I cannot send emails via WP SMTP. However, when Wordfence is deactivated or set to learning mode, the test email works just fine. I tried whitelisting the SMTP server of my hosting provider, but unfortunately, that didn’t resolve the problem.

    What can I do to fix this issue?

    Thanks in advance for your support!

    Best regards,
    Nicole

    The page I need help with: [log in to see the link]

Viewing 6 replies - 1 through 6 (of 6 total)
  • Plugin Support David

    (@dpinson)

    2 months, 3 weeks ago

    Hi there @visualvision,

    Thanks for reaching out! That is a bit odd. When you try sending a test email with Wordfence enabled, are you seeing any error messages? Or does it appear to send correctly?

    If you can let us know if it’s throwing an error, and what the error is, we can check that out and go from there.

    Thanks!

    Thread Starter Visual Vision

    (@visualvision)

    2 months, 3 weeks ago

    Hi,

    thanks for your reply. With Wordfence enabled the test e-mail is not sent. I get a message within wp smtp that it may be caused by the Hoster. but when I switch word fence back to learning mode it’s working (I get the e-mail in my account and I see the message from wp smtp that it worked) …

    This is the message:

    2025-09-02 07:46:22 CLIENT -> SERVER: QUIT

    2025-09-02 07:46:22 SERVER -> CLIENT: 221 mx16lb.world4you.com closing connection

    2025-09-02 07:46:22 Connection: closed

    Ein Problem wurde festgestellt.

    Das bedeutet, dass Deine Test-E-Mail nicht gesendet werden konnte.

    Typischerweise wird dieser Fehler aus einem der folgenden Gründe zurückgegeben:

    • Die Plugin-Einstellungen sind falsch (falsche SMTP-Einstellungen, ungültige E-Mail-Versandanbieter-Konfiguration, etc.).
    • Dein Webserver blockiert die Verbindung.
    • Dein Host lehnt die Verbindung ab.

    Nächste empfohlene Schritte:

    1. Prüfe die Plugin-Einstellungen extra gründlich und erwäge eine Neukonfiguration, um sicherzustellen, dass alles korrekt ist. Vielleicht ga
    2. Wende dich an deinen Webhosting-Anbieter und frage ihn, ob dein Server externe Verbindungen herstellen kann. Frage ihn außerdem, c
      Hinweis: Dies ist die häufigste Ursache für dieses Problem.
    3. Versuche es mit einem anderen E-Mail-Versandanbieter.

    kind regards, Nicole

    Thread Starter Visual Vision

    (@visualvision)

    2 months, 3 weeks ago

    Here’s the screenshot of the original message: https://we.tl/t-as6a7UJXT8

    Thread Starter Visual Vision

    (@visualvision)

    2 months, 3 weeks ago

    Hello once again,

    unfortunately, I still haven’t found a solution. I was able to reproduce the error again:

    • With the Wordfence firewall set to Learning Mode, the test email is sent successfully.
    • With the Wordfence firewall switched on (Enabled and Protecting), the test email is not sent.

    Could someone please check this and advise me on how to configure the firewall so that it is in Protecting Mode while still allowing email sending?

    I would greatly appreciate a swift reply.

    Kind regards,

    Nicole

    Here’s the error log:

    Versions:
    WordPress: 6.8.2
    WordPress MS: No
    PHP: 8.3.24
    WP Mail SMTP: 4.6.0

    Params:
    Mailer: smtp
    Constants: No
    ErrorInfo: SMTP Error: data not accepted.SMTP server error: DATA END command failed Detail: Message rejected as spam SMTP code: 550
    Host: smtp.world4you.com
    Port: 587
    SMTPSecure:    tls
    SMTPAutoTLS:bool(true)
    SMTPAuth:bool(true)

    Server:
    OpenSSL: OpenSSL 1.1.1w 11 Sep 2023

    Debug:
    E-Mail-Quelle WP Mail SMTP Mailer: Anderer SMTP-Server SMTP Error: data not accepted.SMTP server error: DATA END command failed Detail: Message rejected as spam SMTP code: 550

    SMTP Debug:
    2025-09-04 18:54:34 Connection: opening to smtp.world4you.com:587, timeout=30, options=array()
    2025-09-04 18:54:34 Connection: opened
    2025-09-04 18:54:34 SERVER -> CLIENT: 220 mx13lb.world4you.com ESMTP Exim 4.97.1 Thu, 04 Sep 2025 20:54:34 +0200
    2025-09-04 18:54:34 CLIENT -> SERVER: EHLO www.rentthecook.at
    2025-09-04 18:54:34 SERVER -> CLIENT: 250-mx13lb.world4you.com Hello www.rentthecook.at [81.19.145.88]250-SIZE 157286400250-8BITMIME250-PIPELINING250-PIPECONNECT250-AUTH LOGIN PLAIN250-STARTTLS250 HELP
    2025-09-04 18:54:34 CLIENT -> SERVER: STARTTLS
    2025-09-04 18:54:34 SERVER -> CLIENT: 220 TLS go ahead
    2025-09-04 18:54:34 CLIENT -> SERVER: EHLO www.rentthecook.at
    2025-09-04 18:54:34 SERVER -> CLIENT: 250-mx13lb.world4you.com Hello www.rentthecook.at [81.19.145.88]250-SIZE 157286400250-8BITMIME250-PIPELINING250-PIPECONNECT250-AUTH LOGIN PLAIN250 HELP
    2025-09-04 18:54:34 CLIENT -> SERVER: AUTH LOGIN
    2025-09-04 18:54:34 SERVER -> CLIENT: 334 VXNlcm5hbWU6
    2025-09-04 18:54:34 CLIENT -> SERVER: [credentials hidden]
    2025-09-04 18:54:34 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
    2025-09-04 18:54:34 CLIENT -> SERVER: [credentials hidden]
    2025-09-04 18:54:34 SERVER -> CLIENT: 235 Authentication succeeded
    2025-09-04 18:54:34 CLIENT -> SERVER: MAIL FROM:<order@rentthecook.at>
    2025-09-04 18:54:34 SERVER -> CLIENT: 250 OK
    2025-09-04 18:54:34 CLIENT -> SERVER: RCPT TO:<nicoleriegler79@gmail.com>
    2025-09-04 18:54:34 SERVER -> CLIENT: 250 Accepted
    2025-09-04 18:54:34 CLIENT -> SERVER: DATA
    2025-09-04 18:54:34 SERVER -> CLIENT: 354 Enter message, ending with "." on a line by itself
    2025-09-04 18:54:34 CLIENT -> SERVER: Date: Thu, 4 Sep 2025 18:54:34 +0000
    2025-09-04 18:54:34 CLIENT -> SERVER: To: nicoleriegler79@gmail.com
    2025-09-04 18:54:34 CLIENT -> SERVER: From: RENT THE COOK <order@rentthecook.at>
    2025-09-04 18:54:34 CLIENT -> SERVER: Subject: WP Mail SMTP: HTML Test-E-Mail an nicoleriegler79@gmail.com
    2025-09-04 18:54:34 CLIENT -> SERVER: Message-ID: <3jrf16ii2ObwmKkstTXC0fBOJbDwat78p4QP0Tzt2U@www.rentthecook.at>
    2025-09-04 18:54:34 CLIENT -> SERVER: X-Mailer: WPMailSMTP/Mailer/smtp 4.6.0
    2025-09-04 18:54:34 CLIENT -> SERVER: X-Mailer-Type: WPMailSMTP/Admin/Test
    2025-09-04 18:54:34 CLIENT -> SERVER: MIME-Version: 1.0
    2025-09-04 18:54:34 CLIENT -> SERVER: Content-Type: text/html; charset=UTF-8
    2025-09-04 18:54:34 CLIENT -> SERVER:
    2025-09-04 18:54:34 CLIENT -> SERVER: <!doctype html>
    2025-09-04 18:54:34 CLIENT -> SERVER: <html lang="en">
    2025-09-04 18:54:34 CLIENT -> SERVER: <head>
    2025-09-04 18:54:34 CLIENT -> SERVER: <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    2025-09-04 18:54:34 CLIENT -> SERVER: <meta http-equiv="X-UA-Compatible" content="IE=edge">
    2025-09-04 18:54:34 CLIENT -> SERVER: <meta name="viewport" content="width=device-width">
    2025-09-04 18:54:34 CLIENT -> SERVER: <title>WP Mail SMTP Test Email</title>
    2025-09-04 18:54:34 CLIENT -> SERVER: <style type="text/css">@media only screen and (max-width: 599px) {table.body .container {width: 95% !important;}.header {padding: 15px 15px 12px 15px !important;}.header img {width: 200px !important;height: auto !important;}.content, .aside {padding: 30px 40px 20px 40px !important;}}</style>
    2025-09-04 18:54:34 CLIENT -> SERVER: </head>
    2025-09-04 18:54:34 CLIENT -> SERVER: <body style="height: 100% !important; width: 100% !important; min-width: 100%; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; -webkit-font-smoothing: antialiased !important; -moz-osx-font-smoothing: grayscale !important; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; margin: 0; Margin: 0; font-size: 14px; mso-line-height-rule: exactly; line-height: 140%; background-color: #f1f1f1; text-align: center;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <table border="0" cellpadding="0" cellspacing="0" width="100%" height="100%" class="body" style="border-collapse: collapse; border-spacing: 0; vertical-align: top; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; height: 100% !important; width: 100% !important; min-width: 100%; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; -webkit-font-smoothing: antialiased !important; -moz-osx-font-smoothing: grayscale !important; background-color: #f1f1f1; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; margin: 0; Margin: 0; text-align: left; font-size: 14px; mso-line-height-rule: exactly; line-height: 140%;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <tr style="padding: 0; vertical-align: top; text-align: left;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <td align="center" valign="top" class="body-inner wp-mail-smtp" style="word-wrap: break-word; -webkit-hyphens: auto; -moz-hyphens: auto; hyphens: auto; border-collapse: collapse !important; vertical-align: top; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; margin: 0; Margin: 0; font-size: 14px; mso-line-height-rule: exactly; line-height: 140%; text-align: center;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <!-- Container -->
    2025-09-04 18:54:34 CLIENT -> SERVER: <table border="0" cellpadding="0" cellspacing="0" class="container" style="border-collapse: collapse; border-spacing: 0; padding: 0; vertical-align: top; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; width: 600px; margin: 0 auto 30px auto; Margin: 0 auto 30px auto; text-align: inherit;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <!-- Header -->
    2025-09-04 18:54:34 CLIENT -> SERVER: <tr style="padding: 0; vertical-align: top; text-align: left;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <td align="center" valign="middle" class="header" style="word-wrap: break-word; -webkit-hyphens: auto; -moz-hyphens: auto; hyphens: auto; border-collapse: collapse !important; vertical-align: top; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; margin: 0; Margin: 0; font-size: 14px; mso-line-height-rule: exactly; line-height: 140%; text-align: center; padding: 30px 30px 22px 30px;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <img src="https://www.rentthecook.at/wp-content/plugins/wp-mail-smtp/assets/images/email/wp-mail-smtp.png" width="250" alt="WP Mail SMTP Logo" style="outline: none; text-decoration: none; max-width: 100%; clear: both; -ms-interpolation-mode: bicubic; display: inline-block !important; width: 250px;">
    2025-09-04 18:54:34 CLIENT -> SERVER: </td>
    2025-09-04 18:54:34 CLIENT -> SERVER: </tr>
    2025-09-04 18:54:34 CLIENT -> SERVER: <!-- Content -->
    2025-09-04 18:54:34 CLIENT -> SERVER: <tr style="padding: 0; vertical-align: top; text-align: left;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <td align="left" valign="top" style="word-wrap: break-word; -webkit-hyphens: auto; -moz-hyphens: auto; hyphens: auto; border-collapse: collapse !important; vertical-align: top; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; margin: 0; Margin: 0; text-align: left; font-size: 14px; mso-line-height-rule: exactly; line-height: 140%; background-color: #ffffff; padding: 0; border-right: 1px solid #ddd; border-bottom: 1px solid #ddd; border-left: 1px solid #ddd; border-top: 3px solid #809eb0;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse; border-spacing: 0; padding: 0; vertical-align: top; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; margin: 0; Margin: 0; text-align: inherit;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <tr style="padding: 0; vertical-align: top; text-align: left;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <td class="content" style="padding: 60px 75px 45px 75px;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <div class="success" style="text-align: center;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <p class="check" style="-ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; font-size: 14px; mso-line-height-rule: exactly; line-height: 140%; margin: 0 auto 16px auto; Margin: 0 auto 16px auto; text-align: center;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <img src="https://www.rentthecook.at/wp-content/plugins/wp-mail-smtp/assets/images/email/icon-check.png" width="70" alt="Success" style="outline: none; text-decoration: none; max-width: 100%; clear: both; -ms-interpolation-mode: bicubic; display: block; margin: 0 auto 0 auto; Margin: 0 auto 0 auto; width: 50px;">
    2025-09-04 18:54:34 CLIENT -> SERVER: </p>
    2025-09-04 18:54:34 CLIENT -> SERVER: <p class="text-extra-large text-center congrats" style="-ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; mso-line-height-rule: exactly; line-height: 140%; font-size: 20px; text-align: center; margin: 0 0 20px 0; Margin: 0 0 20px 0;">
    2025-09-04 18:54:34 CLIENT -> SERVER: Congrats, test email was sent successfully!
    2025-09-04 18:54:34 CLIENT -> SERVER: </p>
    2025-09-04 18:54:34 CLIENT -> SERVER: <p class="text-large" style="-ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; text-align: left; mso-line-height-rule: exactly; line-height: 140%; margin: 0 0 15px 0; Margin: 0 0 15px 0; font-size: 16px;">
    2025-09-04 18:54:34 CLIENT -> SERVER: Thank you for trying out WP Mail SMTP. We're on a mission to make sure that your emails actually get delivered.
    2025-09-04 18:54:34 CLIENT -> SERVER: </p>
    2025-09-04 18:54:34 CLIENT -> SERVER: <p class="text-large" style="-ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; text-align: left; mso-line-height-rule: exactly; line-height: 140%; margin: 0 0 15px 0; Margin: 0 0 15px 0; font-size: 16px;">
    2025-09-04 18:54:34 CLIENT -> SERVER: If you find this free plugin useful, please consider giving WP Mail SMTP Pro a try!
    2025-09-04 18:54:34 CLIENT -> SERVER: </p>
    2025-09-04 18:54:34 CLIENT -> SERVER: <p class="signature" style="-ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; font-size: 14px; mso-line-height-rule: exactly; line-height: 140%; text-align: left; margin: 20px 0 0 0; Margin: 20px 0 0 0;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <img src="https://www.rentthecook.at/wp-content/plugins/wp-mail-smtp/assets/images/email/signature.png" width="180" alt="Signature" style="outline: none; text-decoration: none; max-width: 100%; clear: both; -ms-interpolation-mode: bicubic; width: 180px; display: block; margin: 0 0 0 0; Margin: 0 0 0 0;">
    2025-09-04 18:54:34 CLIENT -> SERVER: </p>
    2025-09-04 18:54:34 CLIENT -> SERVER: <p style="-ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; text-align: left; font-size: 14px; mso-line-height-rule: exactly; line-height: 140%; margin: 0 0 15px 0; Margin: 0 0 15px 0;">
    2025-09-04 18:54:34 CLIENT -> SERVER: Jared Atchison<br>Co-Founder, WP Mail SMTP
    2025-09-04 18:54:34 CLIENT -> SERVER: </p>
    2025-09-04 18:54:34 CLIENT -> SERVER: </div>
    2025-09-04 18:54:34 CLIENT -> SERVER: </td>
    2025-09-04 18:54:34 CLIENT -> SERVER: </tr>
    2025-09-04 18:54:34 CLIENT -> SERVER: <!-- Aside -->
    2025-09-04 18:54:34 CLIENT -> SERVER: <tr style="padding: 0; vertical-align: top; text-align: left;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <td align="left" valign="top" class="aside upsell-mi" style="word-wrap: break-word; -webkit-hyphens: auto; -moz-hyphens: auto; hyphens: auto; border-collapse: collapse !important; vertical-align: top; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; margin: 0; Margin: 0; font-size: 14px; mso-line-height-rule: exactly; line-height: 140%; background-color: #f8f8f8; border-top: 1px solid #dddddd; text-align: center !important; padding: 30px 75px 25px 75px;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <h6 style="padding: 0; color: #444444; word-wrap: normal; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: bold; mso-line-height-rule: exactly; line-height: 130%; font-size: 18px; text-align: center; margin: 0 0 15px 0; Margin: 0 0 15px 0;">
    2025-09-04 18:54:34 CLIENT -> SERVER: Unlock Powerful Features with WP Mail SMTP Pro
    2025-09-04 18:54:34 CLIENT -> SERVER: </h6>
    2025-09-04 18:54:34 CLIENT -> SERVER: <p class="text-large" style="-ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; mso-line-height-rule: exactly; line-height: 140%; margin: 0 0 15px 0; Margin: 0 0 15px 0; font-size: 16px; text-align: center;">
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    2025-09-04 18:54:34 CLIENT -> SERVER: <p class="text-large last" style="-ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; mso-line-height-rule: exactly; line-height: 140%; font-size: 13px; text-align: center; margin: 0 0 0 0; Margin: 0 0 0 0;">
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    2025-09-04 18:54:34 CLIENT -> SERVER: </p>
    2025-09-04 18:54:34 CLIENT -> SERVER: <center style="width: 100%;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <table class="button large expanded orange" style="border-collapse: collapse; border-spacing: 0; padding: 0; vertical-align: top; text-align: left; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #e27730; width: 100% !important;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <tr style="padding: 0; vertical-align: top; text-align: left;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <td class="button-inner" style="word-wrap: break-word; -webkit-hyphens: auto; -moz-hyphens: auto; hyphens: auto; border-collapse: collapse !important; vertical-align: top; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; color: #444; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; margin: 0; Margin: 0; text-align: left; font-size: 14px; mso-line-height-rule: exactly; line-height: 100%; padding: 20px 0 20px 0;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <table style="border-collapse: collapse; border-spacing: 0; padding: 0; vertical-align: top; text-align: left; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; width: 100% !important;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <tr style="padding: 0; vertical-align: top; text-align: left;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <td style="word-wrap: break-word; -webkit-hyphens: auto; -moz-hyphens: auto; hyphens: auto; border-collapse: collapse !important; vertical-align: top; mso-table-lspace: 0pt; mso-table-rspace: 0pt; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-weight: normal; padding: 0; margin: 0; Margin: 0; font-size: 14px; text-align: center; color: #ffffff; background: #e27730; border: 1px solid #c45e1b; border-bottom: 3px solid #c45e1b; mso-line-height-rule: exactly; line-height: 100%;">
    2025-09-04 18:54:34 CLIENT -> SERVER: <a href="https://wpmailsmtp.com/lite-upgrade/?utm_source=WordPress&utm_medium=plugin-settings&utm_campaign=liteplugin&utm_locale=de_de&utm_content=email-test" style="-ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; margin: 0; Margin: 0; font-family: Helvetica, Arial, sans-serif; font-weight: bold; color: #ffffff; text-decoration: none; display: inline-block; border: 0 solid #c45e1b; mso-line-height-rule: exactly; line-height: 100%; padding: 14px 20px 12px 20px; font-size: 20px; text-align: center; width: 100%; padding-left: 0; padding-right: 0;">
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    2025-09-04 18:54:34 CLIENT -> SERVER: </a>
    2025-09-04 18:54:34 CLIENT -> SERVER: </td>
    2025-09-04 18:54:34 CLIENT -> SERVER: </tr>
    2025-09-04 18:54:34 CLIENT -> SERVER: </table>
    2025-09-04 18:54:34 CLIENT -> SERVER: </td>
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    SMTP Error: data not accepted.
    Thread Starter Visual Vision

    (@visualvision)

    2 months, 1 week ago

    The problem is solved now. I set it up again, now it’s working with firewall on.

    Kind regards!

    Plugin Support David

    (@dpinson)

    2 months, 1 week ago

    Hi there @visualvision,

    I do apologize for the delay. I’m glad to hear you were able to get things working again.

    If you run into any further trouble, just let us know!

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