diff --git a/src/mail.js b/src/mail.js
index 489804953..d5c699336 100644
--- a/src/mail.js
+++ b/src/mail.js
@@ -516,7 +516,11 @@ const RBL_LIST = [
 
 // this function currently only looks for black lists based on IP. TODO: also look up by domain
 async function checkRblStatus(domain) {
-    const ip = await sysinfo.getServerIPv4();
+    const [error, ip] = await safe(sysinfo.getServerIPv4());
+    if (error) {
+        debug(`checkRblStatus: unable to determine server IPv4: ${error.message}`);
+        return { status: false, ip: null, servers: [] };
+    }
 
     const flippedIp = ip.split('.').reverse().join('.');