How to whitelist Barracuda's sender authentication?

If you are using Barracuda’s Email Security Service (cloud), follow these steps to whitelist Barracuda’s Sender Authentication: Log in to your Barracuda Cloud Control. Navigate to Email Security > Sender Authentication. In the Use Sender Policy Framework center enter our IP addresses in the SPF exemptions table.
For More Information Please Refer:

You May Also Like to Read: