I have a VPS server LAMP and all it works normaly. But when I try send a email to external server (outlook.com), this error occurs (visible on postfix log):
Jul 23 18:15:00 serv postfix/smtp[1792]: connect to mx3.hotmail.com[65.55.37.104]:25: Connection timed out
Jul 23 18:15:00 serv postfix/smtp[1793]: connect to mx2.hotmail.com[207.46.8.167]:25: Connection timed out
I've tried changing the smtp port in postfix main.cf file I tried to create a route using the file transport and also didn't work. According to my VPS provider the port 25 is blocked and guided me to change. I've read about it in several places and I know that in fact this is the door of communication between SMTP servers, but still I can't change that. Below, the main.cf
# 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 = zpanel
myhostname = zpanel
mynetworks = all
mydestination = localhost.$mydomain, localhost
relay_domains = proxy:mysql:/etc/zpanel/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/zpanel/configs/postfix/transport
#local_recipient_maps =
# virtual setup
virtual_alias_maps = proxy:mysql:/etc/zpanel/configs/postfix/mysql-virtual_alias_maps.cf,
regexp:/etc/zpanel/configs/postfix/virtual_regexp
virtual_mailbox_base = /var/zpanel/vmail
virtual_mailbox_domains = proxy:mysql:/etc/zpanel/configs/postfix/mysql- virtual_domains_maps.cf
virtual_mailbox_maps = proxy:mysql:/etc/zpanel/configs/postfix/mysql-virtual_mailbox_maps.cf
virtual_mailbox_limit_maps = proxy:mysql:/etc/zpanel/configs/postfix/mysql- virtual_mailbox_limit_maps.cf
virtual_minimum_uid = 150
virtual_uid_maps = static:150
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
# ,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