diff --git a/deploy/postfix/main.cf b/deploy/postfix/main.cf
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+# 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 $mail_name (Debian/GNU)
+biff = no
+
+# appending .domain is the MUA's job.
+append_dot_mydomain = no
+
+# Uncomment the next line to generate "delayed mail" warnings
+#delay_warning_time = 4h
+
+readme_directory = no
+
+# See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on
+# fresh installs.
+compatibility_level = 2
+
+# TLS parameters
+smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
+smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
+smtpd_use_tls=yes
+smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
+smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
+
+# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
+# information on enabling SSL in the smtp client.
+
+smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
+myhostname = symposion.sfconservancy.org
+alias_maps = hash:/etc/aliases
+alias_database = hash:/etc/aliases
+myorigin = /etc/mailname
+mydestination = $myhostname, symposion.novalocal, symposion, localhost
+relayhost = [pine.sfconservancy.org]:587
+mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
+mailbox_size_limit = 0
+recipient_delimiter = +
+inet_interfaces = loopback-only
+inet_protocols = all
+
+# Relay to Conservancy
+#
+smtp_sasl_auth_enable = yes
+smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
+smtp_sasl_security_options = noanonymous
+smtp_tls_security_level = secure
+smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
+
+# Increase default limit of 10M to 50M
+message_size_limit = 51200000
+
+# This configuration rewrites both envelope sender and From header to a single
+# fixed address so that all outgoing mail, including cron emails, can be
+# delivered through a single user-grade SMTP account.
+#
+# Envelope
+canonical_maps = regexp:/etc/postfix/canonical
+canonical_classes = envelope_sender
+# From header
+smtp_header_checks = regexp:/etc/postfix/header_checks
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