I am trying to configure the Postfix Mail server. Ready I made the configuration in postfix and devecot (imap / pop). I can receive emails on my server, but I can't send emails to other servers.
im using ec2 aws Free tier eligible
master.cf
# -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#smtps inet n - y - - smtpd
# -o syslog_name=postfix/smtps
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=
# -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n - y - - qmqpd
pickup unix n - y 60 1 pickup
cleanup unix n - y - 0 cleanup
qmgr unix n - n 300 1 qmgr
#qmgr unix n - n 300 1 oqmgr
tlsmgr unix - - y 1000? 1 tlsmgr
rewrite unix - - y - - trivial-rewrite
bounce unix - - y - 0 bounce
defer unix - - y - 0 bounce
trace unix - - y - 0 bounce
verify unix - - y - 1 verify
flush unix n - y 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - y - - smtp
relay unix - - y - - smtp
-o syslog_name=postfix/$service_name
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - y - - showq
error unix - - y - - error
retry unix - - y - - error
discard unix - - y - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - y - - lmtp
anvil unix - - y - 1 anvil
scache unix - - y - 1 scache
postlog unix-dgram n - n - 1 postlogd
#
# ====================================================================
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent. See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
#
# ====================================================================
#
# Recent Cyrus versions can use the existing "lmtp" master.cf entry.
#
# Specify in cyrus.conf:
# lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
#
# Specify in main.cf one or more of the following:
# mailbox_transport = lmtp:inet:localhost
# virtual_transport = lmtp:inet:localhost
#
# ====================================================================
#
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
#
#cyrus unix - n n - - pipe
# user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
#
# ====================================================================
# Old example of delivery via Cyrus.
#
#old-cyrus unix - n n - - pipe
# flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
#
# ====================================================================
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe
flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman unix - n n - - pipe
flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
${nexthop} ${user}
main.cf
biff = no
append_dot_mydomain = no
readme_directory = no
compatibility_level = 2
# TLS parameters
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = mail.financeinvestimento.com.br
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = $mydomain
mydestination = $myhostname, financeinvestimento.com.br, localhost.financeinvestimento.com.br, localhost
relayhost =
mynetworks = 172.31.16.0/20 127.0.0.0/8 3.19.239.92
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = loopback-only
inet_protocols = ipv4
mail.log
Oct 23 18:50:55 mail postfix/postfix-script[2608]: starting the Postfix mail system
Oct 23 18:50:55 mail postfix/master[2610]: daemon started -- version 3.3.0, configuration /etc/postfix
Oct 23 18:51:06 mail postfix/pickup[2623]: 4E3993F0E5: uid=0 from=<root@mail.financeinvestimento.com.br>
Oct 23 18:51:06 mail postfix/cleanup[2629]: 4E3993F0E5: message-id=<20201023185106.4E3993F0E5@mail.financeinvestimento.com.br>
Oct 23 18:51:06 mail postfix/qmgr[2624]: 4E3993F0E5: from=<root@mail.financeinvestimento.com.br>, size=410, nrcpt=1 (queue active)
Oct 23 18:51:36 mail postfix/smtp[2631]: connect to gmail-smtp-in.l.google.com[142.250.10.27]:25: Connection timed out
Oct 23 18:52:06 mail postfix/smtp[2631]: connect to alt1.gmail-smtp-in.l.google.com[64.233.177.26]:25: Connection timed out
Oct 23 18:52:36 mail postfix/smtp[2631]: connect to alt2.gmail-smtp-in.l.google.com[173.194.175.27]:25: Connection timed out
Oct 23 18:53:06 mail postfix/smtp[2631]: connect to alt3.gmail-smtp-in.l.google.com[173.194.217.27]:25: Connection timed out
Oct 23 18:53:36 mail postfix/smtp[2631]: connect to alt4.gmail-smtp-in.l.google.com[64.233.186.26]:25: Connection timed out
Oct 23 18:53:36 mail postfix/smtp[2631]: 4E3993F0E5: to=<maromaporra@gmail.com>, relay=none, delay=150, delays=0.02/0.01/150/0, dsn=4.4.1, status=deferred (connect to alt4.gmail-smtp-in.l.google.com[64.233.186.26]:25: Connection timed out)
How i can resolve that?
