<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7653.38"> <TITLE>notify-service-by-email failure for *some* addresses?</TITLE> </HEAD> <BODY>  Greetings, My phone and a few POP mailboxes all receive alerts from nagios, the POP boxes via the stock notify-service-by-email, my phone via a custom notify-service-by-shortmail. Shortmail stopped working out of the blue a few days ago, and I just moved my phone over to notify-service-by-email. I'm still not receiving notifications on it. My logs have the relevant error: Feb 3 10:46:41 net nagios: Warning: Contact 'porkchoppager' host notification command '/usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: ACKNOWLEDGEMENT\nHost: slc-fw\nState: DOWN\nAddress: 172.21.7.51\nInfo: (Host Check Timed Out)\n\nDate/Time: Tue Feb 3 10:46:10 EST 2009\n" | /bin/mail -s "** ACKNOWLEDGEMENT Host Alert: slc-fw is DOWN **" mynumber@txt.att.net' timed out after 30 seconds While its executing, I've seen a zombie sh in the processlist along with two sendmail processes just waiting there. The same notification command works flawlessly for 5 other contacts at the same time: The only difference is in the actual email address, and its just a phone number @txt.att.net. I've su'd to the nagios user and executed the whole command. No problem, hits my phone in 30 seconds. Ideas on where to look? -mKaegler </BODY> </HTML>