Store the last time an email was sent as the create/modification date of a file (or as data within the file). Check the time elapsed every time you want to send another email.

if ($condition_requires_email) {
  if (-e 'last.email' && -M 'last.email' < 1.0/24.0) {
    print "Don't need to send email yet\n";
  } else {
    &send_email();
    system('touch','last.email');
  }
}

[download]

Update: corrected logic error pointed out by jhourcle.

Dum Spiro Spero

In reply to Re: Email Thresholding by GotToBTru
in thread Email Thresholding by bfdi533

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