You can add up to 1024 internal domains.
Procedure
- Go to .
- Click Add.
- Type a domain. You can use the * wildcard character as a prefix in the
                        domain.For example, example.com, sub.example.com, or *.example.com.
- Type additional information for the domain.
- (Optional) Specify a note.
- (Optional) Click Add more to add more domains.
- Click Save.
- (Optional) Select Include permitted recipient domains to
                        set the recipient domains you specify on the Limits and Exceptions screen as internal
                        domains.For more information, see Configuring Limits and Exceptions.
- Click Save.After adding a domain:- 
Click Delete to remove the selected entry.
- 
Click Export to download all entries as a CSV file.
 
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