Email notification/alert for each new request on Virtual Server

You are setting yourself up for a DoS attack on your email server. Also, that would be quite a bit of CPU on the F5. As mentioned above, the correct way would be to use High Speed Logging (HSL) to offload a custom message to a remote syslog, splunk, zabbix, whatever server. Then on that remove purpose built logging device I would setup rules for any email generation. Just because you can hack the F5 to do this, you shouldnt. Sometimes, it is best for the operational and security risk of your infrastructure to tell the business or application team that they are smoking too much grass, and that what they are requesting cant be done on the F5. Simple.