php mail() doesn't do anything

[ankhmor]

I have apache + php and other things configured and working on my server. However when I try to send mail with mail() function like this:

<?
if(mail("ankhmor@mail.ru", "test", "just testing")){
echo "done";
}else{
echo "something wrong";
}
?>

the server says

Fatal error: Call to undefined function: mail() in /usr/local/apache2/htdocs/testmail.php on line 2

and to make thing more clear for you guys Ill give you an excerpt of my php.ini:

[mail function]
; For Win32 only.
;SMTP = smtp.gmail.com
;smtp_port = 25

; For Win32 only.
;sendmail_from = me@example.com

; For Unix only.  You may supply arguments as well (default: "sendmail -t -i").
sendmail_path = /usr/sbin/sendmail -t

whats wrong?

[ankhmor]

Finally, I was able to install sendmail and php works with it. However, sendmail doesn't send anything at all. I didn't configure it, maybe thats why. When I try to send mail from a web page it says everything is ok. But the mail never arrives.

I opened my port 25 on my router. I acepted protocols in my guarddog (POP3, POPs3, IMAP, IMAPs, and something else I think).

And to make things clear this is from my mail.log after i send myself an e-mail. If you look at line two it seems that the server send mail only locally.

oh and my e-mail is antonkats@gmail.com

Jul 11 13:36:15 localhost sendmail[12719]: l6BHaFLF012719: from=root, size=131, class=0, nrcpts=1, msgid=<200707111736.l6BHaFLF012719@localhost.localdomain>, relay=root@localhost
Jul 11 13:36:15 localhost sm-mta[12722]: l6BHaF2c012722: <antonkats.com@localhost.localdomain>... User unknown
Jul 11 13:36:15 localhost sendmail[12719]: l6BHaFLF012719: to=antonkats.com, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30131, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.1, stat=User unknown
Jul 11 13:36:15 localhost sm-mta[12722]: l6BHaF2c012722: from=<root@localhost.localdomain>, size=131, class=0, nrcpts=0, proto=ESMTP, daemon=MSP-v4, relay=localhost.localdomain [127.0.0.1]
Jul 11 13:36:15 localhost sendmail[12719]: l6BHaFLF012719: l6BHaFLG012719: DSN: User unknown
Jul 11 13:36:15 localhost sm-mta[12722]: l6BHaF2e012722: from=<>, size=2111, class=0, nrcpts=1, msgid=<200707111736.l6BHaFLG012719@localhost.localdomain>, proto=ESMTP, daemon=MSP-v4, relay=localhost.localdomain [127.0.0.1]
Jul 11 13:36:15 localhost sendmail[12719]: l6BHaFLG012719: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31155, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (l6BHaF2e012722 Message accepted for delivery)
Jul 11 13:36:15 localhost procmail[12727]: Enforcing stricter permissions on "/var/mail/root"
Jul 11 13:36:15 localhost sm-mta[12726]: l6BHaF2e012722: to=<root@localhost.localdomain>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32356, dsn=2.0.0, stat=Sent