Use the following procedure to import LDIF-formatted text files into good and bad sender groups. This procedure does not apply to Symantec Global Good Senders, Symantec Global Bad Senders, directory harvest attacks, email virus attacks, or Fastpass.
Be aware of the following limitations on the number of entries that can be imported into sender groups:
The maximum number of total senders that can be stored, including good and bad senders, is 650,000.
The maximum number of lines per file when importing senders is 500,000. To add more, divide senders into multiple files and import each file separately.
No warning is displayed if you exceed these limits. Sender data is silently dropped.
To import good and bad sender group entries
In the Control Center, click Reputation > Policies > Bad Senders or Reputation > Policies > Good Senders.
Check one of the bad or good sender groups and click Edit.
You can import entries for all good sender groups, or all bad sender groups in one import action, no matter which group you open. However, you cannot import entries for Symantec Global Good Senders, Symantec Global Bad Senders, directory harvest attacks, email virus attacks, or Fastpass.
In the Import dialog box, specify or browse to the location of the text file with the sender information that you want to import.
The sender information must be formatted correctly.