mail() returns -1

[Anon]

When I use the following code

<?php
mail("[e-mail]", "test", "a test mail", "[e-mail]");
?>

the mail reaches me but the mail function returns the following error:

Warning: Mail delivery program returned with exit code: -1 in /usr/local/etc/httpd/ htdocs/hogarthd/test/mail.php on line 9

Warning: Mail delivery program returned: No child processes in /usr/local/etc/httpd/ htdocs/hogarthd/test/mail.php on line 9

The documentation suggests that -1 means the mail has not been deleivered.

Any suggestions what I am doing wrong?

Thanks!

[arpita]

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