When I first installed Bitdefender years ago there was an area, possibly in the firewall where i could block email domains that were spaming me, cannot seem to find that now.
Hello,
Most email providers offer built-in spam filters that automatically detect and divert spam emails to a separate folder. Make sure your spam filter is turned on and set to a high level of protection. This will help to catch most spam emails before they reach your inbox. As for Bitdefender, if you are using Microsoft Outlook or Mozilla Thunderbird you can easily add the senders of the spam messages to the Spammers list. This way you will stop all emails from that person or organization.
https://www.bitdefender.com/consumer/support/answer/2158/
This article may also prove useful:
https://www.bitdefender.com/consumer/support/answer/52799/
I hope this helps.
Regards