Mailer Error: SMTP Error: Could not connect to SMTP host.<hr /><pre>PHPMailer Object
(
    [Priority] => 3
    [CharSet] => UTF-8
    [ContentType] => multipart/alternative
    [Encoding] => 8bit
    [ErrorInfo] => SMTP Error: Could not connect to SMTP host.
    [From] => contact@mdprospects.com
    [FromName] => MDprospects
    [Sender] => 
    [Subject] => testing email
    [Body] => test test test
    [AltBody] => To view the message, please use an HTML compatible email viewer!
    [WordWrap] => 0
    [Mailer] => smtp
    [Sendmail] => /usr/sbin/sendmail
    [PluginDir] => 
    [Version] => 2.3
    [ConfirmReadingTo] => 
    [Hostname] => 
    [MessageID] => 
    [Host] => smtp.mailgun.org
    [Port] => 587
    [Helo] => 
    [SMTPSecure] => tls
    [SMTPAuth] => 1
    [Username] => postmaster@mdprospects.com
    [Password] => 3o8zwcryly77
    [Timeout] => 10
    [SMTPDebug] => 
    [SMTPKeepAlive] => 
    [SingleTo] => 
    [LE] => 

    [smtp:PHPMailer:private] => SMTP Object
        (
            [SMTP_PORT] => 587
            [CRLF] => 

            [do_debug] => 
            [do_verp] => 
            [smtp_conn:SMTP:private] => 0
            [error:SMTP:private] => Array
                (
                    [error] => Called Reset() without being connected
                )

            [helo_rply:SMTP:private] => 
        )

    [to:PHPMailer:private] => Array
        (
            [0] => Array
                (
                    [0] => fatih@glacial.com
                    [1] => 
                )

        )

    [cc:PHPMailer:private] => Array
        (
        )

    [bcc:PHPMailer:private] => Array
        (
        )

    [ReplyTo:PHPMailer:private] => Array
        (
        )

    [attachment:PHPMailer:private] => Array
        (
        )

    [CustomHeader:PHPMailer:private] => Array
        (
            [0] => Array
                (
                    [0] => X-Mailgun-Variables
                    [1] => {"category":"responder_"}
                )

        )

    [message_type:PHPMailer:private] => alt
    [boundary:PHPMailer:private] => Array
        (
            [1] => b1_4b4eb084078d47920ebb8b9c6dffa6f8
            [2] => b2_4b4eb084078d47920ebb8b9c6dffa6f8
        )

    [language:PHPMailer:private] => Array
        (
            [mailer_not_supported] =>  mailer is not supported.
            [provide_address] => You must provide at least one  mailer is not supported.
            [execute] => Could not execute: 
            [instantiate] => Could not instantiate mail function.
            [authenticate] => SMTP Error: Could not authenticate.
            [from_failed] => The following From address failed: 
            [data_not_accepted] => SMTP Error: Data not accepted.
            [recipients_failed] => SMTP Error: The following SMTP Error: Data not accepted.
            [connect_host] => SMTP Error: Could not connect to SMTP host.
            [file_access] => Could not access file: 
            [file_open] => File Error: Could not open file: 
            [encoding] => Unknown encoding: 
            [signing] => Signing Error: 
        )

    [error_count:PHPMailer:private] => 3
    [sign_cert_file:PHPMailer:private] => 
    [sign_key_file:PHPMailer:private] => 
    [sign_key_pass:PHPMailer:private] => 
)
</pre>