WP-Mail-SMTP does not change the Reply-To email address. The email client does not matter. It doesn't even work when testing the plugin.
Test Message Sent
The result was:
bool(true)
The full debugging output is shown below:
object(PHPMailer)#421 (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(20) "noreply@testmail.com"
["FromName"]=>
string(20) "Venmar Systems, Inc."
["Sender"]=>
string(0) ""
["ReturnPath"]=>
string(0) ""
["Subject"]=>
string(45) "WP Mail SMTP: Test mail to robbinp@venmar.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(385) "Date: Wed, 16 Mar 2016 21:44:37 +0000
To: robbinp@venmar.com
From: "Venmar Systems, Inc."
Subject: WP Mail SMTP: Test mail to robbinp@venmar.com
Message-ID: <248870b05ca22d8d03de8bc9511fadcb@venmar.com>
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) "Wed, 16 Mar 2016 21:44:37 +0000"
["Host"]=>
string(16) "smtp2.venmar.com"
["Port"]=>
string(2) "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]=>
object(SMTP)#498 (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(42) "221 Service closing transmission channel
"
}
["to":protected]=>
array(1) {
[0]=>
array(2) {
[0]=>
string(18) "robbinp@venmar.com"
[1]=>
string(0) ""
}
}
["cc":protected]=>
array(0) {
}
["bcc":protected]=>
array(0) {
}
["ReplyTo":protected]=>
array(0) {
}
["all_recipients":protected]=>
array(1) {
["robbinp@venmar.com"]=>
bool(true)
}
["RecipientsQueue":protected]=>
array(0) {
}
["ReplyToQueue":protected]=>
array(0) {
}
["attachment":protected]=>
array(0) {
}
["CustomHeader":protected]=>
array(0) {
}
["lastMessageID":protected]=>
string(45) "<248870b05ca22d8d03de8bc9511fadcb@venmar.com>"
["message_type":protected]=>
string(5) "plain"
["boundary":protected]=>
array(3) {
[1]=>
string(35) "b1_248870b05ca22d8d03de8bc9511fadcb"
[2]=>
string(35) "b2_248870b05ca22d8d03de8bc9511fadcb"
[3]=>
string(35) "b3_248870b05ca22d8d03de8bc9511fadcb"
}
["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) "248870b05ca22d8d03de8bc9511fadcb"
}
The SMTP debugging output is shown below:
2016-03-16 21:44:37 Connection: opening to smtp2.venmar.com:25, timeout=300, options=array (
)
2016-03-16 21:44:37 Connection: opened
2016-03-16 21:44:38 SMTP -> get_lines(): $data is ""
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "220 mail.venmar.com ESMTP Service ready
"
2016-03-16 21:44:38 SERVER -> CLIENT: 220 mail.venmar.com ESMTP Service ready
2016-03-16 21:44:38 CLIENT -> SERVER: EHLO venmar.com
2016-03-16 21:44:38 SMTP -> get_lines(): $data is ""
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "250-Requested mail action okay, completed
"
2016-03-16 21:44:38 SMTP -> get_lines(): $data is "250-Requested mail action okay, completed
"
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "250-SIZE 30720000
"
2016-03-16 21:44:38 SMTP -> get_lines(): $data is "250-Requested mail action okay, completed
250-SIZE 30720000
"
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "250-ETRN
"
2016-03-16 21:44:38 SMTP -> get_lines(): $data is "250-Requested mail action okay, completed
250-SIZE 30720000
250-ETRN
"
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "250-AUTH PLAIN LOGIN
"
2016-03-16 21:44:38 SMTP -> get_lines(): $data is "250-Requested mail action okay, completed
250-SIZE 30720000
250-ETRN
250-AUTH PLAIN LOGIN
"
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "250-AUTH PLAIN LOGIN
"
2016-03-16 21:44:38 SMTP -> get_lines(): $data is "250-Requested mail action okay, completed
250-SIZE 30720000
250-ETRN
250-AUTH PLAIN LOGIN
250-AUTH PLAIN LOGIN
"
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "250-8BITMIME
"
2016-03-16 21:44:38 SMTP -> get_lines(): $data is "250-Requested mail action okay, completed
250-SIZE 30720000
250-ETRN
250-AUTH PLAIN LOGIN
250-AUTH PLAIN LOGIN
250-8BITMIME
"
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "250 OK
"
2016-03-16 21:44:38 SERVER -> CLIENT: 250-Requested mail action okay, completed
250-SIZE 30720000
250-ETRN
250-AUTH PLAIN LOGIN
250-AUTH PLAIN LOGIN
250-8BITMIME
250 OK
2016-03-16 21:44:38 CLIENT -> SERVER: MAIL FROM:
2016-03-16 21:44:38 SMTP -> get_lines(): $data is ""
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "250 Requested mail action okay, completed
"
2016-03-16 21:44:38 SERVER -> CLIENT: 250 Requested mail action okay, completed
2016-03-16 21:44:38 CLIENT -> SERVER: RCPT TO:
2016-03-16 21:44:38 SMTP -> get_lines(): $data is ""
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "250 Requested mail action okay, completed
"
2016-03-16 21:44:38 SERVER -> CLIENT: 250 Requested mail action okay, completed
2016-03-16 21:44:38 CLIENT -> SERVER: DATA
2016-03-16 21:44:38 SMTP -> get_lines(): $data is ""
2016-03-16 21:44:38 SMTP -> get_lines(): $str is "354 Start mail input; end with .
"
2016-03-16 21:44:38 SERVER -> CLIENT: 354 Start mail input; end with .
2016-03-16 21:44:38 CLIENT -> SERVER: Date: Wed, 16 Mar 2016 21:44:37 +0000
2016-03-16 21:44:38 CLIENT -> SERVER: To: robbinp@venmar.com
2016-03-16 21:44:38 CLIENT -> SERVER: From: "Venmar Systems, Inc."
2016-03-16 21:44:38 CLIENT -> SERVER: Subject: WP Mail SMTP: Test mail to robbinp@venmar.com
2016-03-16 21:44:38 CLIENT -> SERVER: Message-ID: <248870b05ca22d8d03de8bc9511fadcb@venmar.com>
2016-03-16 21:44:38 CLIENT -> SERVER: X-Mailer: PHPMailer 5.2.14 (https://github.com/PHPMailer/PHPMailer)
2016-03-16 21:44:38 CLIENT -> SERVER: MIME-Version: 1.0
2016-03-16 21:44:38 CLIENT -> SERVER: Content-Type: text/plain; charset=UTF-8
2016-03-16 21:44:38 CLIENT -> SERVER: Content-Transfer-Encoding: 8bit
2016-03-16 21:44:38 CLIENT -> SERVER:
2016-03-16 21:44:38 CLIENT -> SERVER: This is a test email generated by the WP Mail SMTP WordPress plugin.
2016-03-16 21:44:38 CLIENT -> SERVER:
2016-03-16 21:44:38 CLIENT -> SERVER: .
2016-03-16 21:44:39 SMTP -> get_lines(): $data is ""
2016-03-16 21:44:39 SMTP -> get_lines(): $str is "250 Requested mail action okay, completed
"
2016-03-16 21:44:39 SERVER -> CLIENT: 250 Requested mail action okay, completed
2016-03-16 21:44:39 CLIENT -> SERVER: QUIT
2016-03-16 21:44:39 SMTP -> get_lines(): $data is ""
2016-03-16 21:44:39 SMTP -> get_lines(): $str is "221 Service closing transmission channel
"
2016-03-16 21:44:39 SERVER -> CLIENT: 221 Service closing transmission channel
2016-03-16 21:44:39 Connection: closed