Edit: The code provider tested the code on their end and it went through successfully, so it's a problem with the way godaddy is handling it. I replaced all the code with the stock code and started over from scratch. Godaddy changed the mail routing to their local mail exchanger last night, but still no luck. After changing the following variables, I am now getting a response from the server when using the form, and it appears to be connecting now, but the entire email message gets dumped in the error log. I will post it below. In rd-mailform.php, changed line 107, use TLS, to True, Smtpauth to false, Smtpsecure to none.
In Rd-mailform.config.json, usesmtp to true, localhost, port 25, username and password blank, and specified the recipient email.
error log entry:
[09-Apr-2021 12:58:58 Etc/UTC] PHP Deprecated: __autoload() is deprecated, use spl_autoload_register() instead in /home/fhry8dej5umy/public_html/bat/phpmailer/PHPMailerAutoload.php on line 45
[09-Apr-2021 12:58:58 Etc/UTC] Connection: opening to localhost:25, t=300, opt=array (
)
[09-Apr-2021 12:58:58 Etc/UTC] Connection: opened
[09-Apr-2021 12:58:58 Etc/UTC] SERVER -> CLIENT: 220-p3plzcpnl450427.prod.phx3.secureserver.net ESMTP Exim 4.93 #2 Fri, 09 Apr 2021 05:58:58 -0700
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: EHLO dukecitysecurity.com
[09-Apr-2021 12:58:58 Etc/UTC] SERVER -> CLIENT: 250-p3plzcpnl450427.prod.phx3.secureserver.net Hello dukecitysecurity.com [::1]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: MAIL FROM:<[email protected]>
[09-Apr-2021 12:58:58 Etc/UTC] SERVER -> CLIENT: 250 OK
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: RCPT TO:<[email protected]>
[09-Apr-2021 12:58:58 Etc/UTC] SERVER -> CLIENT: 250 Accepted
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: DATA
[09-Apr-2021 12:58:58 Etc/UTC] SERVER -> CLIENT: 354 Enter message, ending with "." on a line by itself
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Date: Fri, 9 Apr 2021 12:58:58 +0000
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: To: [email protected]
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: From: Michael Kountz <[email protected]>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Subject: A message from your site visitor
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Message-ID: <[email protected]>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: X-Priority: 3
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: X-Mailer: PHPMailer 5.2.9 (https://github.com/PHPMailer/PHPMailer/)
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: MIME-Version: 1.0
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Content-Type: multipart/alternative;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: boundary="b1_e45062494bee28e71d85f6b8095220a2"
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Content-Transfer-Encoding: 8bit
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: --b1_e45062494bee28e71d85f6b8095220a2
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Content-Type: text/plain; charset=us-ascii
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Notification
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Hi, someone left a message for you at dukecitysecurity.com
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: A message from your site visitor
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Email:
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: ****@hotmail.com
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Name:
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Michael K*********
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Phone:
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: **********
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Privacy-Policy-Agreement:
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Got acknowledged and Agreed
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Message:
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: This is an automatically generated email, please do not reply.
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: --b1_e45062494bee28e71d85f6b8095220a2
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: Content-Type: text/html; charset=us-ascii
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER:
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <html xmlns="http://www.w3.org/1999/xhtml">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <head>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <meta name="viewport" content="initial-scale=1.0" />
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <meta name="format-detection" content="telephone=no" />
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <title>A message from your site visitor</title>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <style type="text/css">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: #outlook a {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: padding: 0;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: body {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: width: 100% !important;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: -webkit-text-size-adjust: 100%;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: -ms-text-size-adjust: 100%;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: margin: 0;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: padding: 0;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: .ExternalClass {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: width: 100%;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: .ExternalClass,
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: .ExternalClass span,
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: .ExternalClass font,
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: .ExternalClass td,
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: .ExternalClass div {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: line-height: 100%;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: .ExternalClass p {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: line-height: inherit;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: #body-layout {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: margin: 0;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: padding: 0;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: width: 100% !important;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: line-height: 100% !important;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: img {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: display: block;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: outline: none;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: text-decoration: none;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: -ms-interpolation-mode: bicubic;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: a img {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: border: none;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: table td {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: border-collapse: collapse;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: table {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: border-collapse: collapse;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: mso-table-lspace: 0pt;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: mso-table-rspace: 0pt;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: a {
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: color: orange;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: outline: none;
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: }
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </style>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </head>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <body id="body-layout">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td>Notification</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td>Hi, someone left a message for you at dukecitysecurity.com</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: A message from your site visitor
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td height="20" style="height: 20px; line-height:20px;"></td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td align="center" valign="top">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <table width="100%" align="center" cellpadding="0" cellspacing="0" border="0">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td align="center" valign="top">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <table width="100%" align="center" cellpadding="0" cellspacing="0" border="0">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td width="110" align="left" valign="top" style="padding: 0 10px 0 0;font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;font-weight: 700;">Email:</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td align="left" valign="top" style="font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;">[email protected]</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <!-- #{BeginInfo} -->
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td width="110" align="left" valign="top" style="padding: 0 10px 0 0;font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;font-weight: 700;"><!-- #{InfoState} --></td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td align="left" valign="top" style="font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;"><!-- #{InfoDescription} --></td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td width="110" align="left" valign="top" style="padding: 0 10px 0 0;font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;font-weight: 700;">Name:</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td align="left" valign="top" style="font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;">Michael Kountz</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td width="110" align="left" valign="top" style="padding: 0 10px 0 0;font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;font-weight: 700;">Phone:</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td align="left" valign="top" style="font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;">5053041871</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td width="110" align="left" valign="top" style="padding: 0 10px 0 0;font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;font-weight: 700;">Privacy-Policy-Agreement:</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td align="left" valign="top" style="font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;">Got acknowledged and Agreed</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <!-- #{EndInfo} -->
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td height="12" style="height: 12px; line-height:12px;"></td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td align="left" valign="top" style="font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;font-weight: 700;">Message:</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td align="left" valign="top" style="font-family: Arial, sans-serif; font-size: 14px; mso-line-height-rule: exactly; line-height: 20px; font-weight: 400;color: #302f35;">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td height="40" style="height: 40px; line-height:40px;"></td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td height="20" style="height: 20px; line-height:20px;"></td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td width="600" align="center" valign="top">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <table width="100%" align="center" cellpadding="0" cellspacing="0" border="0">
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td align="center" valign="top" style="font-family: Arial, sans-serif; font-size: 12px; mso-line-height-rule: exactly; line-height: 18px; font-weight: 400;color: #a1b4c4;">This is an automatically generated email, please do not reply.</td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: <td height="20" style="height: 20px; line-height:20px;"></td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </td>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </tr>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </table>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </body>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: </html>
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: --b1_e45062494bee28e71d85f6b8095220a2--
[09-Apr-2021 12:58:58 Etc/UTC] SERVER -> CLIENT: 250 OK id=1lUqiw-00EW1t-Dv
[09-Apr-2021 12:58:58 Etc/UTC] CLIENT -> SERVER: QUIT
[09-Apr-2021 12:58:58 Etc/UTC] SERVER -> CLIENT: 221 p3plzcpnl450427.prod.phx3.secureserver.net closing connection
[09-Apr-2021 12:58:58 Etc/UTC] Connection: closed
I set up an email account hosted by godaddy and specified that account as the sender in rd-mailform.php using the code provided by Synchro. After that, the form would still send ok, but not get received. The recipient email was hosted by gmail. I changed the recipient email to one hosted by hotmail, and the form submissions emailed successfully. In this case, it looks like the problem was with gmail turning away the email at the door. The link provided by synchro, https://github.com/PHPMailer/PHPMailer/wiki/Improving-delivery-rates,-avoiding-spam-filters, would likely help with that, but I don't know how to implement the steps.