ALT Linux Bugzilla – #8827

[lakostis@lks ~]$ php-4.4.6 -r 'if (function_exists("mail")) { echo "OK\n"; }
else {echo "ERR\n"; }'
OK

It been eventually broken in 4.4.3 releases and fixed in 4.4.4+
see http://lists.altlinux.org/pipermail/sisyphus/2006-August/085654.html for
example.

The same goes for php5:

[lakostis@lks ~]$ php-5.2.1 -r 'if (function_exists("mail")) { echo "OK\n"; }
else {echo "ERR\n"; }'
OK