All the email messages that I send are digitally signed, which lets you be sure that they really came from me. All LTS supported email programs will check the signature and display a lock or ribbon icon to let you know that it's correct.
Unfortunately, if you use Microsoft Outlook Express, you may have trouble replying to me or anyone else who sends signed messages. You may see an error message like the one below when you press Send.
If that happens, you need to tell Outlook Express that you don't want to send a signed message of your own in response to mine. To do that, uncheck the Digitally Sign option in the Tools menu as shown below.