TF-4136 refactor(logging): replace logError with logWarning for non-critical cases

core/lib/utils/mail/domain.dart

@@ -70,7 +70,7 @@ class Domain with EquatableMixin {
       InternetAddress(value);
       return true;
     } catch (e) {
-      logError('Domain::validIPAddress: Exception = $e');
+      logWarning('Domain::validIPAddress: Exception = $e');
       return false;
     }
   }

core/lib/utils/mail/mail_address.dart

@@ -100,7 +100,7 @@ class MailAddress with EquatableMixin {
         throw AddressException('No domain found at position ${pos + 1} in "$address"');
       }
     } catch (e) {
-      logError('MailAddress::validate: Exception = $e');
+      logWarning('MailAddress::validate: Exception = $e');
       if (e is AddressException) {
         rethrow;
       } else {