I receive email but not send

[YanoLoL]

Hi guys, i'm testing the Sentora on my Ubuntu VPS, but I have a problem to send emails, when I try to send something, always returns the following error.

Code:

This is the mail system at host painel.raposa.ninja. #################################################################### # THIS IS A WARNING ONLY.  YOU DO NOT NEED TO RESEND YOUR MESSAGE. # #################################################################### Your message could not be delivered for more than 4 hour(s). It will be retried until it is 5 day(s) old. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message.                   The mail system <cristian.y.yano@gmail.com>: connect to    alt2.gmail-smtp-in.l.google.com[2a00:1450:400b:c03::1b]:25: Network is    unreachable Reporting-MTA: dns; painel.raposa.ninja X-Postfix-Queue-ID: D497DC30E6 X-Postfix-Sender: rfc822; contato@raposa.ninja Arrival-Date: Sat, 24 Sep 2016 16:46:18 -0300 (BRT) Final-Recipient: rfc822; cristian.y.yano@gmail.com Original-Recipient: rfc822;cristian.y.yano@gmail.com Action: delayed Status: 4.4.1 Diagnostic-Code: X-Postfix; connect to    alt2.gmail-smtp-in.l.google.com[2a00:1450:400b:c03::1b]:25: Network is    unreachable Will-Retry-Until: Thu, 29 Sep 2016 16:46:18 -0300 (BRT) Return-Path: <contato@raposa.ninja> Received: from painel.raposa.ninja (localhost [127.0.0.1]) by painel.raposa.ninja (Postfix) with ESMTPA id D497DC30E6 for <cristian.y.yano@gmail.com>; Sat, 24 Sep 2016 16:46:18 -0300 (BRT) MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="=_e85195d31df1f8de85deb4d584fa8e25" Date: Sat, 24 Sep 2016 16:46:18 -0300 From: contato@raposa.ninja To: cristian.y.yano@gmail.com Subject: asd Message-ID: <9ed7d427fc1857a22f833ff0f8360486@raposa.ninja> X-Sender: contato@raposa.ninja User-Agent: Roundcube Webmail/1.0.4

How can I fix this problem?

main.cf

Code:

# postfix config file # uncomment for debugging if needed soft_bounce=yes # postfix main mail_owner = postfix setgid_group = postdrop delay_warning_time = 4 # postfix paths html_directory = no command_directory = /usr/sbin daemon_directory = /usr/lib/postfix queue_directory = /var/spool/postfix sendmail_path = /usr/sbin/sendmail.postfix newaliases_path = /usr/bin/newaliases.postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man sample_directory = /usr/share/doc/postfix-2.2.2/samples readme_directory = /usr/share/doc/postfix-2.2.2/README_FILES # network settings inet_interfaces = all mydomain = painel.raposa.ninja myhostname = painel.raposa.ninja mynetworks = 127.0.0.1, 45.55.250.237 mydestination = localhost.$mydomain, localhost relay_domains = proxy:mysql:/etc/sentora/configs/postfix/mysql-relay_domains_maps.cf # mail delivery recipient_delimiter = + # mappings alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases #transport_maps = hash:/etc/postfix/transport #local_recipient_maps = # virtual setup virtual_alias_maps = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_alias_maps.cf,                     regexp:/etc/sentora/configs/postfix/virtual_regexp virtual_mailbox_base = /var/sentora/vmail virtual_mailbox_domains = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_domains_maps.cf virtual_mailbox_maps = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_mailbox_maps.cf virtual_minimum_uid = 999 virtual_uid_maps = static:999 virtual_gid_maps = static:8 virtual_transport = dovecot dovecot_destination_recipient_limit = 1 # debugging debug_peer_level = 2 debugger_command =         PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin         xxgdb $daemon_directory/$process_name $process_id & sleep 5 # authentication smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous smtpd_sasl_local_domain = $myhostname broken_sasl_auth_clients = yes smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth # tls config smtp_use_tls = no smtpd_use_tls = no #smtp_tls_note_starttls_offer = yes #smtpd_tls_loglevel = 1 #smtpd_tls_received_header = yes #smtpd_tls_session_cache_timeout = 3600s #tls_random_source = dev:/dev/urandom #smtp_tls_session_cache_database = btree:$data_directory/smtp_tls_session_cache # Change mail.example.com.* to your host name #smtpd_tls_key_file = /etc/pki/tls/private/mail.example.com.key #smtpd_tls_cert_file = /etc/pki/tls/certs/mail.example.com.crt # smtpd_tls_CAfile = /etc/pki/tls/root.crt # rules restrictions smtpd_client_restrictions = smtpd_helo_restrictions = smtpd_sender_restrictions = smtpd_recipient_restrictions = permit_sasl_authenticated,        permit_mynetworks,        reject_unauth_destination,        reject_non_fqdn_sender,        reject_non_fqdn_recipient,        reject_unknown_recipient_domain # uncomment for realtime black list checks. (Warn: will also reject false positive) #       ,reject_rbl_client zen.spamhaus.org #       ,reject_rbl_client bl.spamcop.net #       ,reject_rbl_client dnsbl.sorbs.net smtpd_helo_required = yes unknown_local_recipient_reject_code = 550 disable_vrfy_command = yes smtpd_data_restrictions = reject_unauth_pipelining smtpd_banner = $myhostname ESMTP message_size_limit = 20480000