host.sub.example.com postfix/pickup[23352]: D1F941407D1: uid=1001 from=<user@host.sub.example.com>
host.sub.example.com postfix/cleanup[26119]: D1F941407D1: message-id=<20170130114758.D1F941407D1@mail.example.com>
host.sub.example.com postfix/qmgr[23353]: D1F941407D1: from=<user@host.sub.example.com>, size=384, nrcpt=1 (queue active)
host.sub.example.com postfix/smtp[26122]: D1F941407D1: to=<work.email@example.com>, relay=alt2.aspmx.l.google.com[74.125.205.27]:25, delay=0.81, delays=0.01/0/0.32/0.47, dsn=2.0.0, status=sent (250 2.0.0 OK 1485776921 14si8136222lju.15 - gsmtp)
host.sub.example.com postfix/qmgr[23353]: D1F941407D1: removed

host.sub.example.com postfix/smtpd[26773]: connect from otherhostname[private-ip-address]
host.sub.example.com postfix/smtpd[26773]: improper command pipelining after MAIL from otherhostname[privateipaddress]: RCPT TO: work.email@example.comrnDATArnFrom: fromheader@mail.example.comrnSubject: word1 word2r
host.sub.example.com postfix/smtpd[26773]: ADD161407D1: client=otherhostname[private-ip-address]
host.sub.example.com postfix/cleanup[26780]: ADD161407D1: message-id=<>
host.sub.example.com postfix/qmgr[23353]: ADD161407D1: from=<mailfrom@mail.example.com>, size=284, nrcpt=1 (queue active)
host.sub.example.com postfix/smtp[26781]: ADD161407D1: host alt1.aspmx.l.google.com[173.194.69.26] said: 421-4.7.0 [public-ip-address      15] Our system has detected that this message is 421-4.7.0 suspicious due to the very low reputation of the sending IP address. 421-4.7.0 To protect our users from spam, mail sent from your IP address has 421-4.7.0 been temporarily rate limited. Please visit 421 4.7.0  https://support.google.com/mail/answer/188131 for more information. 28si16209237wru.213 - gsmtp (in reply to end of DATA command)
host.sub.example.com postfix/smtpd[26773]: disconnect from otherhostname[private-ip-address]
host.sub.example.com postfix/smtp[26781]: ADD161407D1: to=<work.email@example.com>, relay=alt2.aspmx.l.google.com[74.125.205.26]:25, delay=16, delays=0.02/0/16/0.31, dsn=4.7.0, status=deferred (host alt2.aspmx.l.google.com[74.125.205.26] said: 421-4.7.0 [public-ip-address      15] Our system has detected that this message is 421-4.7.0 suspicious due to the very low reputation of the sending IP address. 421-4.7.0 To protect our users from spam, mail sent from your IP address has 421-4.7.0 been temporarily rate limited. Please visit 421 4.7.0  https://support.google.com/mail/answer/188131 for more information. 65si8149735lfw.365 - gsmtp (in reply to end of DATA command))

Trying private-ip-address...
Connected to private-ip-address.
Escape character is '^]'.
220 mail.example.com ESMTP Postfix (Ubuntu)
HELO mail.example.com
MAIL FROM: mailfrom@mail.example.com
RCPT TO: work.email@example.com
DATA
From: fromheader@mail.example.com
Subject: word1 word2
Line1
Line2
Line3
.
250 mail.example.com
250 2.1.0 Ok
250 2.1.5 Ok
354 End data with <CR><LF>.<CR><LF>
250 2.0.0 Ok: queued as ADD161407D1
QUIT
221 2.0.0 Bye
Connection closed by foreign host.

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

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.example.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydomain = mail.example.com
myorigin = /etc/mailname
mydestination = mail.example.com localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 private-ip-network
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = ipv4
smtp_generic_maps = hash:/etc/postfix/generic

Delivered-To: work.email@example.com
Received: by 10.182.80.36 with SMTP id o4csp1373399obx;
        Mon, 30 Jan 2017 04:43:46 -0800 (PST)
X-Received: by 10.25.22.211 with SMTP id 80mr2073754lfw.89.1485780226765;
        Mon, 30 Jan 2017 04:43:46 -0800 (PST)
Return-Path: <mailfrom@mail.example.com>
Received: from mail.example.com (ec2-etc.compute.amazonaws.com. [public-ip-address])
        by mx.google.com with ESMTP id q189si8223874lfe.362.2017.01.30.04.43.46
        for <work.email@example.com>;
        Mon, 30 Jan 2017 04:43:46 -0800 (PST)
Received-SPF: neutral (google.com: public-ip-addres is neither permitted nor denied by best guess record for domain of mailfrom@mail.example.com) client-ip=public-ip-address;
Authentication-Results: mx.google.com;
       spf=neutral (google.com: public-ip-address is neither permitted nor denied by best guess record for domain of mailfrom@mail.example.com) smtp.mailfrom=mailfrom@mail.example.com
Date: Mon, 30 Jan 2017 04:43:46 -0800 (PST)
Message-Id: <588f3502.c6a7190a.dccd4.4f34SMTPIN_ADDED_MISSING@mx.google.com>
Received: from mail.example.com (otherhostname [private-ip-address]) by mail.example.com (Postfix) with SMTP id ADD161407D1 for <work.email@example.com>; Mon, 30 Jan 2017 11:55:27 +0000 (UTC)
From: fromheader@mail.example.com
Subject: subjectline

Line1
Line2

Delivered-To: work.email@example.com
Received: by 10.182.80.36 with SMTP id o4csp319976obx;
        Fri, 27 Jan 2017 09:59:19 -0800 (PST)
X-Received: by 10.84.195.1 with SMTP id i1mr14082000pld.77.1485539959249;
        Fri, 27 Jan 2017 09:59:19 -0800 (PST)
Return-Path: <no-reply@mail.example.com>
Received: from mail.example.com (ec2-etc.compute.amazonaws.com. [public-ip-address])
        by mx.google.com with ESMTP id h125si7036671wme.3.2017.01.27.09.59.18
        for <work.email@example.com>;
        Fri, 27 Jan 2017 09:59:19 -0800 (PST)
Received-SPF: neutral (google.com: public-ip-address is neither permitted nor denied by best guess record for domain of no-reply@mail.example.com) client-ip=public-ip-address;
Authentication-Results: mx.google.com;
       spf=neutral (google.com: public-ip-address is neither permitted nor denied by best guess record for domain of no-reply@mail.example.com) smtp.mailfrom=no-reply@mail.example.com
Received: by mail.example.com (Postfix, from userid 1001) id 61C031407CF; Fri, 27 Jan 2017 17:49:22 +0000 (UTC)
Subject: This is the subject line
To: <work.email@example.com>
X-Mailer: mail (GNU Mailutils 2.99.98)
Message-Id: <20170127174922.61C031407CF@mail.example.com>
Date: Fri, 27 Jan 2017 17:49:22 +0000 (UTC)
From: Filipe Simoes <no-reply@mail.example.com>

This is the body of the email

Message-Id: <588f3502.c6a7190a.dccd4.4f34SMTPIN_ADDED_MISSING@mx.google.com>
Received: from mail.example.com (otherhostname [private-ip-address]) by mail.example.com (Postfix) with SMTP id ADD161407D1 for <work.email@example.com>; Mon, 30 Jan 2017 11:55:27 +0000 (UTC)

Message-Id: <20170127174922.61C031407CF@mail.example.com>
Received: by mail.example.com (Postfix, from userid 1001) id 61C031407CF; Fri, 27 Jan 2017 17:49:22 +0000 (UTC)