[Plugin: WP-Mail-SMTP] Cannot send mails

Hello,

I’ve setup WordPress on a new Amazon instance. I’m using Contact Form 7 with WP-Mail-SMTP. But emails are not being sent.

I’ve done some manual testing of the mail() function via a script and it works with no issues.

I’m choosing the ‘Use the PHP mail() function to send emails.’ option.

But no emails are being sent. See sample output from test below, although it states the mail is being sent, I never actually received it.

Test Message Sent
The result was:
NULL
The full debugging output is shown below:
object(PHPMailer)#513 (75) {
[“Version”]=>
string(6) “5.2.14”
[“Priority”]=>
NULL
[“CharSet”]=>
string(10) “iso-8859-1”
[“ContentType”]=>
string(10) “text/plain”
[“Encoding”]=>
string(4) “8bit”
[“ErrorInfo”]=>
string(0) “”
[“From”]=>
string(14) “root@localhost”
[“FromName”]=>
string(9) “Root User”
[“Sender”]=>
string(0) “”
[“ReturnPath”]=>
string(0) “”
[“Subject”]=>
string(0) “”
[“Body”]=>
string(0) “”
[“AltBody”]=>
string(0) “”
[“Ical”]=>
string(0) “”
[“MIMEBody”:protected]=>
string(0) “”
[“MIMEHeader”:protected]=>
string(0) “”
[“mailHeader”:protected]=>
string(0) “”
[“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(0) “”
[“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(0) {
}
[“cc”:protected]=>
array(0) {
}
[“bcc”:protected]=>
array(0) {
}
[“ReplyTo”:protected]=>
array(0) {
}
[“all_recipients”:protected]=>
array(0) {
}
[“RecipientsQueue”:protected]=>
array(0) {
}
[“ReplyToQueue”:protected]=>
array(0) {
}
[“attachment”:protected]=>
array(0) {
}
[“CustomHeader”:protected]=>
array(0) {
}
[“lastMessageID”:protected]=>
string(0) “”
[“message_type”:protected]=>
string(0) “”
[“boundary”:protected]=>
array(0) {
}
[“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(0) “”
}

Any help appreciated.