Update: the log file monitor is not appropriate as workaround, but File & Directory Change monitor is, unchecking file date and checking MD5 hash value to detect any change and using script:
del domainrecords.txt
nslookup -querytype=mx mydomain.com >> domainrecords.txt
nslookup -querytype=txt mydomain.com >> domainrecords.txt
nslookup -querytype=cname mydomain.com >> domainrecords.txt