diff --git a/CHANGES b/CHANGES
index e420e73c0..283f739be 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2578,6 +2578,7 @@
 * du: fix crash when filesystem is cifs/nfs/sshfs
 * Start with a default to not fail if no swap is present
 * Fix bug in cert cleanup logic causing it to repeatedly cleanup
+* Fix crash in RBL check
 
 [7.4.0]
 * Update base image to jammy
diff --git a/src/mail.js b/src/mail.js
index 7eeb22d1d..7848cb0e0 100644
--- a/src/mail.js
+++ b/src/mail.js
@@ -539,7 +539,7 @@ async function checkRblStatus(domain) {
         const [error2, txtRecords] = await safe(dig.resolve(flippedIp + '.' + rblServer.dns, 'TXT', DNS_OPTIONS));
         result.txtRecords = error2 || !txtRecords ? 'No txt record' : txtRecords.map(x => x.join(''));
 
-        debug(`checkRblStatus: ${domain} (error: ${error2.message}) (txtRecords: ${JSON.stringify(txtRecords)})`);
+        debug(`checkRblStatus: ${domain} (error: ${error2?.message || null}) (txtRecords: ${JSON.stringify(txtRecords)})`);
 
         blacklistedServers.push(result);
     }
@@ -590,7 +590,7 @@ async function getStatus(domain) {
     for (let i = 0; i < checks.length; i++) {
         const response = responses[i], check = checks[i];
         if (response.status !== 'fulfilled') {
-            debug(`check ${check.what} was rejected. This is not expected`);
+            debug(`check ${check.what} was rejected. This is not expected. reason: ${response.reason}`);
             continue;
         }