diff --git a/default.nix b/default.nix
index 3abdfbc..d294b99 100644
--- a/default.nix
+++ b/default.nix
@@ -868,6 +868,14 @@ in
           The sender name for DMARC reports. Defaults to the organization name.
         '';
       };
+
+      excludeDomains = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = ''
+          List of domains or eSLDs to be excluded from DMARC reports.
+        '';
+      };
     };
 
     debug = mkOption {
diff --git a/mail-server/rspamd.nix b/mail-server/rspamd.nix
index ee1b8a5..28bd7a1 100644
--- a/mail-server/rspamd.nix
+++ b/mail-server/rspamd.nix
@@ -65,6 +65,9 @@ in
                 org_name = "${cfg.dmarcReporting.organizationName}";
                 from_name = "${cfg.dmarcReporting.fromName}";
                 msgid_from = "dmarc-rua";
+                ${lib.optionalString (cfg.dmarcReporting.excludeDomains != []) ''
+                  exclude_domains = ${builtins.toJSON cfg.dmarcReporting.excludeDomains};
+                ''}
               }''}
           ''; };
       };