> safely drop non-DKIM mail Yes, but the customer will blame you when e-mail from a misconfigured MTA doesn't arrive (from my experience running one). If only

> safely drop non-DKIM mail Yes, but the customer will blame you when e-mail from a misconfigured MTA doesn't arrive (from my experience running one). If only we'd had DKIM from the start, preventing thousands of broken servers from being set up in the last twenty five years...