Reason.

SDP is not published externally however external clients and customers will email in requests but do not require the email as they will not be able to access it.  I have to use a junk filter stopping any external domain from getting ANY notification.  (I really dislike the all or nothing or nature of this product but alas we're tied up in it.)

User forgets their details but knows the SDP address hits Resend details link on login page.