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Enable SMTP relay if configured via environment variables. #2258

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Enable SMTP relay if configured via environment variables. #2258

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18 changes: 18 additions & 0 deletions setup/mail-postfix.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -296,6 +296,24 @@ ufw_allow smtp
ufw_allow smtps
ufw_allow submission

# Configure SMTP Relay

if [[ -n "${SMTP_RELAY_ENDPOINT:-}" && -n "${SMTP_RELAY_PORT:-}" && \
-n "${SMTP_RELAY_USER:-}" && -n "${SMTP_RELAY_PASSWORD:-}" ]]; then
postconf -e "relayhost = [$SMTP_RELAY_ENDPOINT]:$SMTP_RELAY_PORT" \
"smtp_sasl_auth_enable = yes" \
"smtp_sasl_security_options = noanonymous" \
"smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd" \
"smtp_use_tls = yes" \
"smtp_tls_security_level = encrypt" \
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This changes the value that we set elsewhere.

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I have tested this and did not see any impact on the overall behaviour of my box other than the relaying.

Though happy to scope it down. Can you elaborate what specifically you see is conflicting?

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The purpose of relayhost is to send all mail via the relay, so the settings should match the relay. It doesn´t matter anymore how we set them elsewhere. However, if we don´t want to use the relay anymore, make sure the settings are restored to their original settings.

"smtp_tls_note_starttls_offer = yes"
echo "[$SMTP_RELAY_ENDPOINT]:$SMTP_RELAY_PORT $SMTP_RELAY_USER:$SMTP_RELAY_PASSWORD" >> /etc/postfix/sasl_passwd
postmap hash:/etc/postfix/sasl_passwd
chown root:root /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db
chmod 0600 /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db
postconf -e 'smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt'
fi

# Restart services

restart_service postfix
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