On my home Fedora Core 4 box I run Apache 2.0. Sometimes when sendingmail with php no mail is delivered, and I find this in the logs: <<< 550-Verification failed for <apache@xxxxxxxxxxxxxxxxxxxxx><<< 550-unrouteable mail domain "localhost.localdomain"<<< 550 Sender verify failed So I changed the only email address in httpd.conf to:ServerAdmin dotan@xxxxxxxxxxxxxx But I still get the error! I did restart apache and even went so far as toreboot the machine. If I cannot modify the parameter within apache,then where should I modify it? Within php? Within sendmail? Thank you. Dotan Cohenhttp://technology-sleuth.com/question/what_are_the_advantages_of_lcd_monitors.html(-)