How can I monitor outgoing email from Unix and Sendmail?
You can also monitor all system calls to write and read functions by executing:
ps auxw | grep sendmail | awk '{print"-p " $2}' | xargs strace -s 256 -f 2>&1 | grep -E $'@|(([0-9]+\.){3}[0-9]+)' | tee -a "/var/log/sendmail-logs.log"This will give you direct access to the information, you cannot go deeper I think.
Can you give some sample logs? I think you're best bet would be to look through them with either grep or cut to get the source/destinations that are being sent too. Also, you could write a Perl script to automate it once you have the correct regex. This would be the best option.