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)
				aW1wb3J0IHJlCnJlZ2V4ID0gciIoXGJFdmVudCBkZW1vbiBsb2cgZW50cnk6KSg/OlxyP1xufFxyKSsoXFtbXl1dK1xdLiopIgplbWFpbF9ib2R5ID0gKCJFdmVudCBkZW1vbiBsb2cgZW50cnk6XG5cbiIKICAgICAgICAgICAgIlsyNy8xMi8yMDE4IDA4OjE1OjAyXSBDQVVBSk1fSV80MDI0NSBFVkVOVDogQUxBUk0gQUxBUk06IE1BWFJVTkFMQVJNIEpPQjogcDFfY3JlZGl0X3F2X2N1cnZlX3NuYXAgTUFDSElORTogcDFwcm9nMDYiKQoKZm9yIChnMSwgZzIpIGluIHJlLmZpbmRhbGwocmVnZXgsIGVtYWlsX2JvZHkgLCByZS5JR05PUkVDQVNFKToKICAgIHByaW50KGcxICsgZzIp