Hi @bobbi2,
Thanks for reaching out!
To answer your question, keeping an email log is generally a great practice, especially if you ever need to troubleshoot lost messages. However, the Email Log feature is actually part of the paid WP Mail SMTP Pro version, so it is not available to toggle on in the free version you are currently using.
That being said, since you are just using it for basic form emails, you likely don’t need continuous logging from the start. Once you have successfully sent a test email from the WP Mail SMTP -> Tools -> Email Test tab, you can be confident your configuration is working properly.
I hope this clarifies things. Thank you!