irule for SMTP

Hi Jeff,

It may be easier for people to review your iRule if you format it, using the preformatted code option.

Ideally you should be using $1. But the error you are seeing is because you are using $1 in a client side context before the connection to the server has been made, so the address unknown at this stage.

You should also try to capture an email using tcpdump/wireshark and calculate how many bytes into the payload the google.com and gmail.com are. That way you only need to collect the number of bytes needed.

Lee