IMP 2.3.6 , sending messages problem

[Bartosz Aninowski]

When I try send message there is error
====
Warning: Failed opening 'Mail/rfc822.php' for inclusion
(include_path='/usr/local/lib/php') in ../lib/MIME.php on line 73

Fatal error: Undefined class name 'mail_rfc822' in ../lib/MIME.php on line
75
====
There is no any rfc822.php file. Is there something else which I should
install?
Php is compiles with following modules
FTP Support: Yes
Gettext Support: Yes
IMAP Support: Yes
LDAP Support: No
MCAL Support: No
Mcrypt Support: No
MySQL Support: Yes
PostgreSQL Support: No
XML Support: Yes