I followed those instructions, but still no luck... I've emptied /var/log/mail.log, restarted my computer, and attempted to send an email via a PHP script. here's the new log: --- Jul 4 22:28:36 Justin-Frenchs-Computer sendmail[397]: File descriptors missing on startup: stdin, stdout, stderr; Bad file descriptor Jul 4 22:28:36 Justin-Frenchs-Computer sendmail[403]: starting daemon (8.12.9): SMTP+queueing at 01:00:00 Jul 4 22:28:36 Justin-Frenchs-Computer sendmail[405]: File descriptors missing on startup: stdin, stdout, stderr; Bad file descriptor Jul 4 22:28:36 Justin-Frenchs-Computer sendmail[406]: starting daemon (8.12.9): queueing at 01:00:00 Jul 4 22:31:16 Justin-Frenchs-Computer sendmail[404]: h64CCvnt000523: to=<justin at indent.com.au>, ctladdr=<nobody at justin-frenchs-computer.local> (-2/-2)$ rred: Name server: indent.com.au.: host name lookup failure Jul 4 22:32:26 Justin-Frenchs-Computer sendmail[447]: h64CWQkM000447: from=nobody, size=102, class=0, nrcpts=1, msgid=<200307041232.h64CWQkM000447 at just$ Jul 4 22:32:26 Justin-Frenchs-Computer sendmail[448]: h64CWQvR000448: from=<nobody at justin-frenchs-computer.local>, size=340, class=0, nrcpts=1, msgid=<$ 27.0.0.1] Jul 4 22:32:26 Justin-Frenchs-Computer sendmail[447]: h64CWQkM000447: to=justin at indent.com.au, ctladdr=nobody (-2/-2), delay=00:00:00, xdelay=00:00:00,$ ccepted for delivery) Jul 4 22:33:56 Justin-Frenchs-Computer sendmail[404]: h64COBnt000557: to=<justin at indent.com.au>, ctladdr=<nobody at justin-frenchs-computer.local> (-2/-2)$ rred: Name server: indent.com.au.: host name lookup failure --- Any help would be great, Justin