Just uploaded an ecommerce site and all orders go through, but when client sent download link for digital delivery, it comes up as expired. Have changed link validity to 72 and left blank - but still not working. Also all files are public on Amazon S3. Advice PLEASE!
I m experiencing the same issue, would also like to hear the solution.
We have recently released RapidCart Pro 4.0.4 that fixes email corruption with some SMTP servers.