I have quite a few domains that I blacklisted because they are either catchall domains or greylisting servers. I been adding them through backend > settings > email blacklist method. I have to add each domain using regex. I just found another option in the backend > email blacklist > domain blacklist. Does this one do the same thing as the other method using regex? I have about 5000 domains blacklisted does having so many bog down the server when sending email being that it has to check those domains before sending the email?