Environmental variable syntax for mail client subject line

[andersenj]

Hello,

I am creating a mail-client config that will perform hourly show commands and generate an email. The "subject" command under mail-client indicates that is supports environmental variables, but I cannot find any documentation on the web or on the device to tell me the syntax for those variables.

Ultimately, I would like to populate a timestamp at the beginning of my email subject. Can anyone tell me how this can be done?

Current config:

mail-client top-talkers-hourly

  address to user@domain.com

  subject Top-Talkers Hourly

  capture commands

    do show ip flow top-talkers hour detail

    do show clock

    exit

  send trigger track weekdays-hourly pass

  no shutdown

Router(config-mail-client-top-talkers-hourly)#subject ?

WORD                   - Subject (environment variables supported)

Thanks.