BCC messages are not archived. However, it is important to maintain that account so the email does not bounce. We suggest that you devise a process to manage and maintain your BCC messages and use that as the best archive.
All email behaviors, including opens, clickthroughs, and behavior criteria that are used in queries, are tracked the same way that the original email is tracked. Avoid opening or clicking within the BCC email so reporting results are not skewed and inaccurate.
For testing purposes, you can use BCC for a test list send. However, if you want to test an email without using BCC, perform a quick test or use a test list that isn't enabled for BCC.
You can see the original recipient's email address in the To field in the BCC inbox. Go into the BCC inbox and select the email. In the To field, use the search tools to find the original recipient's email address. For example, to search Gmail to find an email address, search for the specific email by subject line, From field, or To field. You can see the From address only in the inbox.
Mail throttling does not count against BCC-enabled sends. Mail throttling applies to recipient sends and does not include the blind copies in its count. Use mail throttling with BCC to avoid email reputation issues or overwhelming your BCC inbox. For example, you deploy an email to 100,000 contacts, but set throttling to 5,000 an hour. Your email is sent to 5000 recipients and 5000 copies to your designated BCC email address, totaling 10,000 contacts an hour. Counts only the original 5000 messages, not the 5000 BCC messages.