tcpdump HTTP headers

1. tcpdump -vvvs 1024 -l -A port 80 | egrep '^[A-Z][a-zA-Z\-]+:|GET|POST'
1. Match your port, here it is 80, could be 8080 or 443, e.g.

Exim: rewrite "From" field

Amazon's AWS SES service requires email be addressed from a particular user.

1. Add to begin rewrite section
1. *  root@abc.com  Ffrs
2. Reload exim

Stolen from: http://serverfault.com/questions/377821/exim-send-every-emails-with-a-predefined-sender