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I have checked your logs for the email address firstname.lastname@example.org and found that all emails were sent properly. Here are just some of them:
If you are not seeing the emails in your inbox, please check your spam folder. If in case the emails are not in the spam folder as well, and that you are using an email client software such as MS Outlook, Eudora, etc, please try to login to your webmail account. It's highly probable that the emails landed on the spam folder there which is why it was not downloaded properly by your email client. Once you find the emails in the spam folder, please move them to your inbox for proper recognition by your anti-spam filter the move that the emails are not spam.
Further, you may try to contact your email service provider and ask them to whitelist the IP addresses found on this guide: https://www.jotform.com/help/145-Whitelisting-JotMails-IP-Addresses
If you have questions, please do let us know.