Howdy, I've been around for a while, but I don't chat much. The last Chevy version I touched was version 2, and I just paid for the v4 license with Paypal, but never saw an email for a license or anything?
Some emails could bounce for endless reasons as mailbox full, timeout issues, server down, etc... In your case the email failure is:
Code:
smtp; 550 4.4.7 Message expired: unable to deliver in 840 minutes.<421 4.4.2 Connection timed out
^^^ It means that your email server wasn't online for receiving emails when our email delivery platform sent the license details. You should check that as we (chevereto.com) and Paddle (paddle.com) send you an email once you complete a transaction, if you didn't get any email you should be worried.
In any case, the license was inserted and you can consume at panel/license.