Re: [Nmh-workers] Re: should nmh be an MTA or an MUA?

[Lyndon Nerenberg]

> An example: The differences between envelope recipients and
> what is actually listed in the RFC (2)822 header.
>
> Many of the lightweight sendmail replacement programs
> will grab address from the message header to determine
> recipients, and this behavior is undesirable for nmh uses.

This is a very important point.

Also, if you want to use features like future delivery (RFC 4865), 
deliver-by (RFC 2852), or message tracking (RFC 3885) you pretty much have 
to do your initial submission via SMTP (typically authenticated on port 
587).

--lyndon