Using Balsa with external sendmail command

[Joe <joe on list gmail com>]

Hi all,

my mail configuration is based on fetchmail and procmail for ingoing
messages. It uses procmail and esmtp to send messages.

Follows my muttrc send command as example:
---
set sendmail="/usr/bin/formail \
              -s /usr/bin/procmail \
              -t -m \
              /home/joe/.procmailoutrc"
---

It is not installed a listening sendmail daemon on my system.
Is there a way to configura balsa so that It just calls my sendmail
command?

I installed balsa 2.5.1 (not the last one 2.5.2, cause my system is a
bit too old an doesn't provides new gtk libs).

Thanks in advance!
Bye