import re
regex = r"(\bEvent demon log entry:)(?:\r?\n|\r)+(\[[^]]+\].*)"
email_body = ("Event demon log entry:\n\n"
            "[27/12/2018 08:15:02] CAUAJM_I_40245 EVENT: ALARM ALARM: MAXRUNALARM JOB: p1_credit_qv_curve_snap MACHINE: p1prog06")

for (g1, g2) in re.findall(regex, email_body , re.IGNORECASE):
    print(g1 + g2)