Problem with contact form

I used both plugins

– With Check email, i sent a test email

– with wp mail smtp i try to send test email but i receive this:

The result was:

bool(false)

The full debugging output is shown below:

object(PHPMailer)#4515 (69) {
[“Version”]=>
string(5) “5.2.7”
[“Priority”]=>
int(3)
[“CharSet”]=>
string(5) “UTF-8”
[“ContentType”]=>
string(10) “text/plain”
[“Encoding”]=>
string(4) “8bit”
[“ErrorInfo”]=>
string(22) “SMTP connect() failed.”
[“From”]=>
string(27) “####@5dim-ermoup.kyk.sch.gr”
[“FromName”]=>
string(3) “nek”
[“Sender”]=>
string(0) “”
[“ReturnPath”]=>
string(0) “”
[“Subject”]=>
string(47) “WP Mail SMTP: Test mail to ####@gmail.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(446) “Date: Wed, 15 Oct 2014 13:45:27 +0000
Return-Path:
To: ####@gmail.com
From: nek
Subject: WP Mail SMTP: Test mail to nektariosf@gmail.com
Message-ID: <8912aa20d41104997ca91a8f448fc1f5@5dim-ermoup.kyk.sch.gr>
X-Priority: 3
X-Mailer: PHPMailer 5.2.7 (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(0) “”
[“Host”]=>
string(6) “userdb”
[“Port”]=>
string(2) “25”
[“Helo”]=>
string(0) “”
[“SMTPSecure”]=>
string(0) “”
[“SMTPAuth”]=>
bool(false)
[“Username”]=>
string(0) “”
[“Password”]=>
string(0) “”
[“AuthType”]=>
string(0) “”
[“Realm”]=>
string(0) “”
[“Workstation”]=>
string(0) “”
[“Timeout”]=>
int(10)
[“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)#4542 (12) {
[“Version”]=>
string(5) “5.2.7”
[“SMTP_PORT”]=>
int(25)
[“CRLF”]=>
string(2) “
“
[“do_debug”]=>
bool(true)
[“Debugoutput”]=>
string(4) “echo”
[“do_verp”]=>
bool(false)
[“Timeout”]=>
int(10)
[“Timelimit”]=>
int(30)
[“smtp_conn”:protected]=>
bool(false)
[“error”:protected]=>
NULL
[“helo_rply”:protected]=>
NULL
[“last_reply”:protected]=>
string(0) “”
}
[“to”:protected]=>
array(1) {
[0]=>
array(2) {
[0]=>
string(20) “####@gmail.com”
[1]=>
string(0) “”
}
}
[“cc”:protected]=>
array(0) {
}
[“bcc”:protected]=>
array(0) {
}
[“ReplyTo”:protected]=>
array(0) {
}
[“all_recipients”:protected]=>
array(1) {
[“####@gmail.com”]=>
bool(true)
}
[“attachment”:protected]=>
array(0) {
}
[“CustomHeader”:protected]=>
array(0) {
}
[“lastMessageID”:protected]=>
string(57) “<8912aa20d41104997ca91a8f448fc1f5@5dim-ermoup.kyk.sch.gr>”
[“message_type”:protected]=>
string(5) “plain”
[“boundary”:protected]=>
array(3) {
[1]=>
string(35) “b1_8912aa20d41104997ca91a8f448fc1f5”
[2]=>
string(35) “b2_8912aa20d41104997ca91a8f448fc1f5”
[3]=>
string(35) “b3_8912aa20d41104997ca91a8f448fc1f5”
}
[“language”:protected]=>
array(18) {
[“authenticate”]=>
string(35) “SMTP Error: Could not authenticate.”
[“connect_host”]=>
string(43) “SMTP Error: Could not connect to SMTP host.”
[“data_not_accepted”]=>
string(30) “SMTP Error: data not accepted.”
[“empty_message”]=>
string(18) “Message body empty”
[“encoding”]=>
string(18) “Unknown encoding: “
[“execute”]=>
string(19) “Could not execute: “
[“file_access”]=>
string(23) “Could not access file: “
[“file_open”]=>
string(33) “File Error: Could not open file: “
[“from_failed”]=>
string(35) “The following From address failed: “
[“instantiate”]=>
string(36) “Could not instantiate mail function.”
[“invalid_address”]=>
string(15) “Invalid address”
[“mailer_not_supported”]=>
string(25) ” mailer is not supported.”
[“provide_address”]=>
string(54) “You must provide at least one recipient email address.”
[“recipients_failed”]=>
string(45) “SMTP Error: The following recipients failed: “
[“signing”]=>
string(15) “Signing Error: “
[“smtp_connect_failed”]=>
string(22) “SMTP connect() failed.”
[“smtp_error”]=>
string(19) “SMTP server error: “
[“variable_set”]=>
string(30) “Cannot set or reset variable: “
}
[“error_count”:protected]=>
int(2)
[“sign_cert_file”:protected]=>
string(0) “”
[“sign_key_file”:protected]=>
string(0) “”
[“sign_key_pass”:protected]=>
string(0) “”
[“exceptions”:protected]=>
bool(true)
}

The SMTP debugging output is shown below:

SMTP -> ERROR: Failed to connect to server: Connection refused (111)

what can I do, to fix this?