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Code Issues Releases Activity

docs: Proxy Protocol share postscreen_cache_map (#4571)

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Brennan Kinney
2025-09-22 00:19:42 +12:00
committed by GitHub
parent f343f7d960
commit 369f357351
1 changed files with 9 additions and 7 deletions
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docs/content/examples/tutorials/mailserver-behind-proxy.md
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@@ -257,14 +257,16 @@ The below guidance is focused on configuring [Traefik][traefik-web], but the adv
# Create a variant for port 25 too (NOTE: Port 10025 is already assigned in DMS to Amavis):
postconf -Mf smtp/inet | sed -e s/^smtp/12525/ >> /etc/postfix/master.cf
# Enable PROXY Protocol support (different setting as port 25 is handled via postscreen), optionally configure a `syslog_name` to distinguish in logs:
postconf -P 12525/inet/postscreen_upstream_proxy_protocol=haproxy 12525/inet/syslog_name=postfix/smtpd-proxyprotocol
```
# Enable PROXY Protocol support:
# - Uses a different setting as port 25 is handled via the postscreen service
# - Optionally configure a `syslog_name` to distinguish in logs
postconf -P \
12525/inet/postscreen_upstream_proxy_protocol=haproxy \
12525/inet/syslog_name=postfix/smtpd-proxyprotocol
Supporting port 25 with an additional PROXY protocol port will also require a `postfix-main.cf` override line for `postscreen` to work correctly:
```cf title="docker-data/dms/config/postfix-main.cf"
postscreen_cache_map = proxy:btree:$data_directory/postscreen_cache
# Supporting port 25 with an additional PROXY protocol port (12525) will also require to
# share a postscreen cache between each running postscreen service via a `proxymap`:
postconf 'postscreen_cache_map = proxy:btree:$data_directory/postscreen_cache'
```
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