Ubuntu

Aug 28 16:53:53 ip-172-31-3-184 postfix/qmgr[5174]: 535454D34: removed
Aug 28 16:53:54 ip-172-31-3-184 postfix/smtpd[5537]: disconnect from unknown[xx.xx.xxx.xxx]
Aug 28 16:54:16 ip-172-31-3-184 postfix/smtpd[5537]: connect from unknown[xx.xx.xxx.xxx]
Aug 28 16:54:17 ip-172-31-3-184 postfix/smtpd[5537]: NOQUEUE: reject: RCPT from unknown[xx.xx.xxx.xxx]: 554 5.7.1 <user2@qasource.com>: Relay access denied test1@mydomain.com> to=<user1@otherdomain.com> proto=ESMTP helo=<[127.0.0.1]>
Aug 28 16:54:25 ip-172-31-3-184 postfix/smtpd[5537]: disconnect from unknown[xx.xx.xxx.xxx]
Aug 28 16:55:30 ip-172-31-3-184 dovecot: pop3-login: Login: user=<sales>, method=PLAIN, rip=xx.xx.xxx.xxx, lip=xx.xx.xxx.xxx, mpid=5553, TLS
Aug 28 16:55:32 ip-172-31-3-184 dovecot: pop3(sales): Disconnected: Logged out top=0/0, retr=0/0, del=0/21, size=166580
Aug 28 16:57:20 ip-172-31-3-184 dovecot: pop3-login: Login: user=<test1>, method=PLAIN, rip=203.190.154.38, lip=172.31.3.184, mpid=5563, TLS
Aug 28 16:57:22 ip-172-31-3-184 dovecot: pop3(test1): Disconnected: Logged out top=0/0, retr=1/697, del=0/17, size=78351

# See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file = /etc/ssl/certs/postfix.pem
smtpd_tls_key_file = /etc/ssl/private/postfix.pem
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.
#smtpd_sasl_auth_enable = yes
#broken_sasl_auth_clients = yes
#smtpd_sasl_type = dovecot
#smtpd_sasl_path = private/auth
#smtpd_sasl_security_options = noanonymous

myhostname = ip-10-168-49-111.us
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
#mydestination = mydomain.com, ip-10-168-49-111.us, localhost.us, localhost
mydestination = mydomain.com, ip-10-168-49-111.us, localhost.us, localhost
relayhost =
mynetworks = 127.0.0.0/8, 172.31.0.0/16
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = ipv4
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, check_relay_domains

relay_domains = mydomain.com

relay_domains = mydomain.com, other.domain