Add googles SPF record as below. This will help prevent the spam issue.
Create a new TXT record with the following values:
- In the Name/Host/Alias field, enter @ or leave it blank. Your other DNS records might indicate which one you need.
- In the Time to Live (TTL) field, enter 3600 or leave the default.
- In the Value/Answer/Destination field, enter v=spf1 include:_spf.google.com ~all