This article provides a bit more guidance when you should specify the Trailing Dot when added a DNS record. Trailing Dots tell the DNS server that this is a fully qualified name. The Period (dot) is the root of the DNS hierarchy. If you don't use the Period (dot), the DNS server assumes that it's a record in the current zone and will append it for you.
While you might need to specify a DNS record in your zone file manually, it's essential to consider where and how you identify the DNS record. At times you find that the primary domain gets appended to your DNS record. This article provides a bit more guidance when you should specify the Trailing Dot when added a DNS record.
When adding a DNS Record, you must include the trailing Period (dot) after and domain, for example:
Otherwise if not specified it will append your domain to the end of the DNS record.
More details can be reviewed further in our documentation: