est Message Sent
The result was:
bool(true)
The full debugging output is shown below:
object(PHPMailer)#525 (73) {
  ["Version"]=>
  string(6) "5.2.10"
  ["Priority"]=>
  int(3)
  ["CharSet"]=>
  string(5) "UTF-8"
  ["ContentType"]=>
  string(10) "text/plain"
  ["Encoding"]=>
  string(4) "8bit"
  ["ErrorInfo"]=>
  string(0) ""
  ["From"]=>
  string(31) "wordpress@about.myhomeparty.net"
  ["FromName"]=>
  string(9) "WordPress"
  ["Sender"]=>
  string(0) ""
  ["ReturnPath"]=>
  string(0) ""
  ["Subject"]=>
  string(50) "WP Mail SMTP: Test mail to antoine@myhomeparty.net"
  ["Body"]=>
  string(68) "This is a test email generated by the WP Mail SMTP WordPress plugin."
  ["AltBody"]=>
  string(0) ""
  ["Ical"]=>
  string(0) ""
  ["MIMEBody":protected]=>
  string(69) "This is a test email generated by the WP Mail SMTP WordPress plugin.
"
  ["MIMEHeader":protected]=>
  string(329) "Date: Mon, 7 Dec 2015 14:06:51 +0000
From: WordPress
Message-ID: <95290e254583b3c8911fc80d54f85ace@about.myhomeparty.net>
X-Priority: 3
X-Mailer: PHPMailer 5.2.10 (https://github.com/PHPMailer/PHPMailer/)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
"
  ["mailHeader":protected]=>
  string(88) "To: antoine@myhomeparty.net
Subject: WP Mail SMTP: Test mail to antoine@myhomeparty.net
"
  ["WordWrap"]=>
  int(0)
  ["Mailer"]=>
  string(4) "mail"
  ["Sendmail"]=>
  string(18) "/usr/sbin/sendmail"
  ["UseSendmailOptions"]=>
  bool(true)
  ["PluginDir"]=>
  string(0) ""
  ["ConfirmReadingTo"]=>
  string(0) ""
  ["Hostname"]=>
  string(0) ""
  ["MessageID"]=>
  string(0) ""
  ["MessageDate"]=>
  string(30) "Mon, 7 Dec 2015 14:06:51 +0000"
  ["Host"]=>
  string(9) "localhost"
  ["Port"]=>
  int(25)
  ["Helo"]=>
  string(0) ""
  ["SMTPSecure"]=>
  string(0) ""
  ["SMTPAutoTLS"]=>
  bool(true)
  ["SMTPAuth"]=>
  bool(false)
  ["SMTPOptions"]=>
  array(0) {
  }
  ["Username"]=>
  string(0) ""
  ["Password"]=>
  string(0) ""
  ["AuthType"]=>
  string(0) ""
  ["Realm"]=>
  string(0) ""
  ["Workstation"]=>
  string(0) ""
  ["Timeout"]=>
  int(300)
  ["SMTPDebug"]=>
  bool(true)
  ["Debugoutput"]=>
  string(4) "echo"
  ["SMTPKeepAlive"]=>
  bool(false)
  ["SingleTo"]=>
  bool(false)
  ["SingleToArray"]=>
  array(0) {
  }
  ["do_verp"]=>
  bool(false)
  ["AllowEmpty"]=>
  bool(false)
  ["LE"]=>
  string(1) "
"
  ["DKIM_selector"]=>
  string(0) ""
  ["DKIM_identity"]=>
  string(0) ""
  ["DKIM_passphrase"]=>
  string(0) ""
  ["DKIM_domain"]=>
  string(0) ""
  ["DKIM_private"]=>
  string(0) ""
  ["action_function"]=>
  string(0) ""
  ["XMailer"]=>
  string(0) ""
  ["smtp":protected]=>
  NULL
  ["to":protected]=>
  array(1) {
    [0]=>
    array(2) {
      [0]=>
      string(23) "antoine@myhomeparty.net"
      [1]=>
      string(0) ""
    }
  }
  ["cc":protected]=>
  array(0) {
  }
  ["bcc":protected]=>
  array(0) {
  }
  ["ReplyTo":protected]=>
  array(0) {
  }
  ["all_recipients":protected]=>
  array(1) {
    ["antoine@myhomeparty.net"]=>
    bool(true)
  }
  ["attachment":protected]=>
  array(0) {
  }
  ["CustomHeader":protected]=>
  array(0) {
  }
  ["lastMessageID":protected]=>
  string(56) "<95290e254583b3c8911fc80d54f85ace@about.myhomeparty.net>"
  ["message_type":protected]=>
  string(5) "plain"
  ["boundary":protected]=>
  array(3) {
    [1]=>
    string(35) "b1_95290e254583b3c8911fc80d54f85ace"
    [2]=>
    string(35) "b2_95290e254583b3c8911fc80d54f85ace"
    [3]=>
    string(35) "b3_95290e254583b3c8911fc80d54f85ace"
  }
  ["language":protected]=>
  array(0) {
  }
  ["error_count":protected]=>
  int(0)
  ["sign_cert_file":protected]=>
  string(0) ""
  ["sign_key_file":protected]=>
  string(0) ""
  ["sign_extracerts_file":protected]=>
  string(0) ""
  ["sign_key_pass":protected]=>
  string(0) ""
  ["exceptions":protected]=>
  bool(true)
  ["uniqueid":protected]=>
  string(32) "95290e254583b3c8911fc80d54f85ace"
}
The SMTP debugging output is shown below: