Good evening @clueless1,
Welcome to the Rogers Community!
Normally, if you send an email from and don't receive a failed delivery message, it means it was successfully delivered to your intended recipient's email system. However, that doesn't guarantee the email was opened and/or read.
Rogers Mail does not provide a "read/return receipt" feature. To confirm that your recipient has received and/or read an important message, you could ask them to confirm receipt by sending you a reply or use a third party email client.
Let us know if you have any other questions!