Test Message Sent The result was: bool(true) The full debugging output is shown below: object(PHPMailer)#6385 (75) { ["Version"]=> string(6) "5.2.14" ["Priority"]=> NULL ["CharSet"]=> string(5) "UTF-8" ["ContentType"]=> string(10) "text/plain" ["Encoding"]=> string(4) "8bit" ["ErrorInfo"]=> string(0) "" ["From"]=> string(34) "swisscomply@digitale.mehrwerte.net" ["FromName"]=> string(11) "SwissComply" ["Sender"]=> string(0) "" ["ReturnPath"]=> string(0) "" ["Subject"]=> string(46) "WP Mail SMTP: Test mail to martin@herrhein.com" ["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(398) "Date: Tue, 27 Sep 2016 15:49:42 +0000 To: martin@herrhein.com From: SwissComply Subject: WP Mail SMTP: Test mail to martin@herrhein.com Message-ID: X-Mailer: PHPMailer 5.2.14 (https://github.com/PHPMailer/PHPMailer) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit " ["mailHeader":protected]=> string(0) "" ["WordWrap"]=> int(0) ["Mailer"]=> string(4) "smtp" ["Sendmail"]=> string(18) "/usr/sbin/sendmail" ["UseSendmailOptions"]=> bool(true) ["PluginDir"]=> string(0) "" ["ConfirmReadingTo"]=> string(0) "" ["Hostname"]=> string(0) "" ["MessageID"]=> string(0) "" ["MessageDate"]=> string(31) "Tue, 27 Sep 2016 15:49:42 +0000" ["Host"]=> string(13) "87.230.85.137" ["Port"]=> string(2) "25" ["Helo"]=> string(0) "" ["SMTPSecure"]=> string(0) "" ["SMTPAutoTLS"]=> bool(true) ["SMTPAuth"]=> bool(true) ["SMTPOptions"]=> array(0) { } ["Username"]=> string(34) "swisscomply@digitale.mehrwerte.net" ["Password"]=> string(11) "braunweI19s" ["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]=> object(SMTP)#6373 (13) { ["Version"]=> string(6) "5.2.14" ["SMTP_PORT"]=> int(25) ["CRLF"]=> string(2) " " ["do_debug"]=> bool(true) ["Debugoutput"]=> string(4) "echo" ["do_verp"]=> bool(false) ["Timeout"]=> int(300) ["Timelimit"]=> int(300) ["smtp_conn":protected]=> NULL ["error":protected]=> array(4) { ["error"]=> string(0) "" ["detail"]=> string(0) "" ["smtp_code"]=> string(0) "" ["smtp_code_ex"]=> string(0) "" } ["helo_rply":protected]=> NULL ["server_caps":protected]=> NULL ["last_reply":protected]=> string(24) "221 nl.daimler-bkk.com " } ["to":protected]=> array(1) { [0]=> array(2) { [0]=> string(19) "martin@herrhein.com" [1]=> string(0) "" } } ["cc":protected]=> array(0) { } ["bcc":protected]=> array(0) { } ["ReplyTo":protected]=> array(0) { } ["all_recipients":protected]=> array(1) { ["martin@herrhein.com"]=> bool(true) } ["RecipientsQueue":protected]=> array(0) { } ["ReplyToQueue":protected]=> array(0) { } ["attachment":protected]=> array(0) { } ["CustomHeader":protected]=> array(0) { } ["lastMessageID":protected]=> string(53) "" ["message_type":protected]=> string(5) "plain" ["boundary":protected]=> array(3) { [1]=> string(35) "b1_c3ab642be3c40ba5596d328f2b3ba0ca" [2]=> string(35) "b2_c3ab642be3c40ba5596d328f2b3ba0ca" [3]=> string(35) "b3_c3ab642be3c40ba5596d328f2b3ba0ca" } ["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) "c3ab642be3c40ba5596d328f2b3ba0ca" } The SMTP debugging output is shown below: 2016-09-27 15:49:42 Connection: opening to 87.230.85.137:25, timeout=300, options=array ( ) 2016-09-27 15:49:42 Connection: opened 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "220 nl.daimler-bkk.com ESMTP " 2016-09-27 15:49:42 SERVER -> CLIENT: 220 nl.daimler-bkk.com ESMTP 2016-09-27 15:49:42 CLIENT -> SERVER: EHLO swisscomply.ch.dev 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250-nl.daimler-bkk.com " 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "250-nl.daimler-bkk.com " 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250-AUTH=LOGIN CRAM-MD5 PLAIN " 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "250-nl.daimler-bkk.com 250-AUTH=LOGIN CRAM-MD5 PLAIN " 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250-AUTH LOGIN CRAM-MD5 PLAIN " 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "250-nl.daimler-bkk.com 250-AUTH=LOGIN CRAM-MD5 PLAIN 250-AUTH LOGIN CRAM-MD5 PLAIN " 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250-STARTTLS " 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "250-nl.daimler-bkk.com 250-AUTH=LOGIN CRAM-MD5 PLAIN 250-AUTH LOGIN CRAM-MD5 PLAIN 250-STARTTLS " 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250-PIPELINING " 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "250-nl.daimler-bkk.com 250-AUTH=LOGIN CRAM-MD5 PLAIN 250-AUTH LOGIN CRAM-MD5 PLAIN 250-STARTTLS 250-PIPELINING " 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250 8BITMIME " 2016-09-27 15:49:42 SERVER -> CLIENT: 250-nl.daimler-bkk.com 250-AUTH=LOGIN CRAM-MD5 PLAIN 250-AUTH LOGIN CRAM-MD5 PLAIN 250-STARTTLS 250-PIPELINING 250 8BITMIME 2016-09-27 15:49:42 CLIENT -> SERVER: STARTTLS 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "220 ready for tls " 2016-09-27 15:49:42 SERVER -> CLIENT: 220 ready for tls 2016-09-27 15:49:42 CLIENT -> SERVER: EHLO swisscomply.ch.dev 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250-nl.daimler-bkk.com " 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "250-nl.daimler-bkk.com " 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250-AUTH=LOGIN CRAM-MD5 PLAIN " 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "250-nl.daimler-bkk.com 250-AUTH=LOGIN CRAM-MD5 PLAIN " 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250-AUTH LOGIN CRAM-MD5 PLAIN " 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "250-nl.daimler-bkk.com 250-AUTH=LOGIN CRAM-MD5 PLAIN 250-AUTH LOGIN CRAM-MD5 PLAIN " 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250-PIPELINING " 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "250-nl.daimler-bkk.com 250-AUTH=LOGIN CRAM-MD5 PLAIN 250-AUTH LOGIN CRAM-MD5 PLAIN 250-PIPELINING " 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250 8BITMIME " 2016-09-27 15:49:42 SERVER -> CLIENT: 250-nl.daimler-bkk.com 250-AUTH=LOGIN CRAM-MD5 PLAIN 250-AUTH LOGIN CRAM-MD5 PLAIN 250-PIPELINING 250 8BITMIME 2016-09-27 15:49:42 Auth method requested: UNKNOWN 2016-09-27 15:49:42 Auth methods available on the server: LOGIN,CRAM-MD5,PLAIN 2016-09-27 15:49:42 Auth method selected: LOGIN 2016-09-27 15:49:42 CLIENT -> SERVER: AUTH LOGIN 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "334 VXNlcm5hbWU6 " 2016-09-27 15:49:42 SERVER -> CLIENT: 334 VXNlcm5hbWU6 2016-09-27 15:49:42 CLIENT -> SERVER: c3dpc3Njb21wbHlAZGlnaXRhbGUubWVocndlcnRlLm5ldA== 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "334 UGFzc3dvcmQ6 " 2016-09-27 15:49:42 SERVER -> CLIENT: 334 UGFzc3dvcmQ6 2016-09-27 15:49:42 CLIENT -> SERVER: YnJhdW53ZUkxOXM= 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "235 go ahead " 2016-09-27 15:49:42 SERVER -> CLIENT: 235 go ahead 2016-09-27 15:49:42 CLIENT -> SERVER: MAIL FROM: 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250 ok " 2016-09-27 15:49:42 SERVER -> CLIENT: 250 ok 2016-09-27 15:49:42 CLIENT -> SERVER: RCPT TO: 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "250 ok " 2016-09-27 15:49:42 SERVER -> CLIENT: 250 ok 2016-09-27 15:49:42 CLIENT -> SERVER: DATA 2016-09-27 15:49:42 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:42 SMTP -> get_lines(): $str is "354 go ahead " 2016-09-27 15:49:42 SERVER -> CLIENT: 354 go ahead 2016-09-27 15:49:42 CLIENT -> SERVER: Date: Tue, 27 Sep 2016 15:49:42 +0000 2016-09-27 15:49:42 CLIENT -> SERVER: To: martin@herrhein.com 2016-09-27 15:49:42 CLIENT -> SERVER: From: SwissComply 2016-09-27 15:49:42 CLIENT -> SERVER: Subject: WP Mail SMTP: Test mail to martin@herrhein.com 2016-09-27 15:49:42 CLIENT -> SERVER: Message-ID: 2016-09-27 15:49:42 CLIENT -> SERVER: X-Mailer: PHPMailer 5.2.14 (https://github.com/PHPMailer/PHPMailer) 2016-09-27 15:49:42 CLIENT -> SERVER: MIME-Version: 1.0 2016-09-27 15:49:42 CLIENT -> SERVER: Content-Type: text/plain; charset=UTF-8 2016-09-27 15:49:42 CLIENT -> SERVER: Content-Transfer-Encoding: 8bit 2016-09-27 15:49:42 CLIENT -> SERVER: 2016-09-27 15:49:42 CLIENT -> SERVER: This is a test email generated by the WP Mail SMTP WordPress plugin. 2016-09-27 15:49:42 CLIENT -> SERVER: 2016-09-27 15:49:42 CLIENT -> SERVER: . 2016-09-27 15:49:43 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:43 SMTP -> get_lines(): $str is "250 ok 1474991383 qp 26506 " 2016-09-27 15:49:43 SERVER -> CLIENT: 250 ok 1474991383 qp 26506 2016-09-27 15:49:43 CLIENT -> SERVER: QUIT 2016-09-27 15:49:43 SMTP -> get_lines(): $data is "" 2016-09-27 15:49:43 SMTP -> get_lines(): $str is "221 nl.daimler-bkk.com " 2016-09-27 15:49:43 SERVER -> CLIENT: 221 nl.daimler-bkk.com 2016-09-27 15:49:43 Connection: closed