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8 changes: 5 additions & 3 deletions docs/configuration.md
Original file line number Diff line number Diff line change
Expand Up @@ -95,6 +95,8 @@ global:
[ smtp_require_tls: <bool> | default = true ]
# The default TLS configuration for SMTP receivers
[ smtp_tls_config: <tls_config> ]
# Force implicit TLS regardless of SMTP port
[ smtp_force_implicit_tls: <bool>]

# Default settings for the JIRA integration.
[ jira_api_url: <string> ]
Expand Down Expand Up @@ -999,7 +1001,7 @@ to: <tmpl_string>
# Force use of implicit TLS (direct TLS connection) for better security.
# true: force use of implicit TLS (direct TLS connection on any port)
# nil (default): auto-detect based on port (465=implicit, other=explicit) for backward compatibility
[ implicit_tls: <bool> | default = nil ]
[ force_implicit_tls: <bool> | default = nil ]

# TLS configuration.
tls_config:
Expand Down Expand Up @@ -1033,9 +1035,9 @@ receivers:
email_configs:
- to: alerts@example.com
smarthost: smtp.example.com:8465
implicit_tls: true # Use direct TLS connection on port 8465
force_implicit_tls: true # Use direct TLS connection on port 8465

# Example 2: Backward compatible (no implicit_tls specified)
# Example 2: Backward compatible (no force_implicit_tls specified)
receivers:
- name: email-default
email_configs:
Expand Down