Sandy and the Doc

[Toto]

Bill Frantz wrote:

> I hope if such a system is set up, people who use it will realize that
> email is not 100% reliable.  Just because algebra.com sent mail to
> toad.com, doesn't mean that toad.com actually received it.  A small
> fraction of a percent of these messages will be lost.

  Are there any critereon established, yet, as to what type of content
will be necessary for a letter to get 'lost'?