sendmail status

Wanted to clarify the status of sendmail.
   
https://docs.freebsd.org/en/books/handbook/mail/#dragonFly-mail-agent
   
says:
  
*quote*
dma(8) is not intended as a replacement for real, big MTAs like sendmail(8)
*end quote*

Does this mean that sendmail in the base OS
is *not* deprecated or similar?

I'm not against adapting and trying dma,
but I'm confused by the the handbook examples
of using dma to route outgoing mail
through 3rd party servers.

Does it mean that dma only works with external smtp?
i.e. does dma not have its own smtp?

However, if sendmail is not deprecated/obsolescent,
I'd prefer to keep using that.

Thank you

Anton