If you don't receive emails from us or have problems sending emails to firstname.lastname@example.org - it is probably because your email program mistakenly thinks that our emails are 'spam'. If you find any emails from DecPlay in your spam folder, click on them and mark them as 'Not Spam'. If you try to send and email to email@example.com and receive an error message, see if you can find an option to mark the email as 'not spam'.
Here is some more info that should help:-
Is my email in your spam folder? If so, mark the email as "not spam".
Whitelist my email address (also known as 'safelist' and 'allowlist'). Show your email provider that you approve receiving emails from me by adding declan1@DecPlayPiano.com and firstname.lastname@example.org to your contacts or your 'whitelist' in your email service.