use commons-lang3

src/main/java/org/cobbzilla/mail/sender/SmtpMailConfig.java

@@ -4,7 +4,7 @@ import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.experimental.Accessors;
-import org.apache.commons.lang.ArrayUtils;
+import org.apache.commons.lang3.ArrayUtils;
 
 import static org.cobbzilla.util.daemon.ZillaRuntime.empty;