notes from Ken

Many widely deployed mail client apps support S/MIME. Banks worry about phishing and security since generally they are either liable for losses due to unauthorized online account access or act as though they are to encourage use of the online tools rather than expensive agents.
I really wish a bank supported me giving them a [...]

RFC 761 section 1.2.2.

2.10. Robustness Principle
TCP implementations should follow a general principle of robustness:
be conservative in what you do, be liberal in what you accept from
others.

RFC 1122 elaborates with section 1.2.2.:

1.2.2 Robustness Principle
At every layer of the [...]