Fully Qualified Domain Names (FQDNs) may end with a final dot (e.g. www.example.com.).
I understand the final dot indicates a FULL domain, and name matching shouldn't be tried on assumed domains. (ie. do not try to match www.example.com.edu, even if sent from inside a .edu site that is configured this way)
But if I try to send to a valid email address via Gmail that ends with a final dot, I get the error:
The address "email@example.com." in the "To" field was not recognized. Please make sure that all addresses are properly formed.
Is Gmail correct in considering company-dot-com-dot improperly formed? Is this a Gmail error, or is there a reason that email addresses shouldn't use FQDNs that end with a final dot?