verificationStatus property
Indicates whether this address has been verified for use as a send-as alias.
Read-only. This setting only applies to custom "from" aliases. Possible string values are:
- "verificationStatusUnspecified" : Unspecified verification status.
 - "accepted" : The address is ready to use as a send-as alias.
 - "pending" : The address is awaiting verification by the owner.
 
Implementation
core.String? verificationStatus;