Overriding monit alerts with mail-format on a per check basis

I currently have two monit checks for each host I have running HTTPS:

check host www-example-https with address www.example.org
  if failed
    port 443
    protocol https
  then alert

check host www-example-certificate with address www.example.org
  every "25 10 * * *"
  if failed
    port 443
    protocol https
    and certificate valid > 30 days
  then alert

The first one warns me of a failure to connect at all, and runs every 2 minutes, whereas the second reminds me that a certificate has fewer that 30 days until expiry and only runs once a day.

At the moment both checks result in a similar alert message, which means that a certificate nearing expiry looks like a complete failure of HTTPS. I’d therefore like to override the default mail options on a per-alert basis.

I know I can do this with set mail-format if I want to change all alerts, but I can’t figure out the syntax for a single alert if I’m using an if failed ... then alert block, and I can’t find any examples of this specific use case in the manual.

Is it possible to override mail-format on a per-alert basis for the types of alerts I’ve defined above?

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