It must be possible to specify both both the subject line and the content of the message. Based on earlier discussions, it may be sufficient to have the content of the message be a list of Status Server variables. The message body would then contain the name value pairs of the Status Server variables. An example is as follows:
Subject: MP Vacuum Warning Body: /i/megacam/fipvar/cryoErrors: vacuumCritical = FALSE vacuumOutOfRange = TRUE vacuumTooHigh = TRUE vacuumTooLow = FALSE
Because some of the target email devices may have text size limitations, it may be premature to define a rigid message content until more detail is known about the target devices.