Is there a way of deleting 'Blocked' listed emails?

Yes, on a Mac: select a message, and Control-click on it to select to Delete it or move it to Trash, or whatever. Once you move it to Trash it should be automatically deleted within some period of time, determined by the settings for each account.

Go to Mail -> Settings -> Accounts to check the Mailbox settings for each account, and set when you want mail to erase deleted messages from Trash, Junk, etc.

"Blocked" emails should end up in either the Junk or Trash for the account -- depending on how you treat them.

You can set the time it takes to erase messages in either folder in Mail -> Settings, then select the Accounts tab, click on the name of an account, and select the Mailbox Behaviors tab. There you should see (and be able to choose) how long messages can live in Junk (default is to never Erase), and Trash (default is one month).

May it be suggested yet another easy way >>

Mail >> Top Menu >> Mailbox and " Erase Junk Mail "

On the 2 machines running Ventura 13.2 whatever was in Junk is Deleted Immediately.

Not even arriving in Deleted Folder

Refer to image below

Slimsteve wrote:

I receive spam emails, regularly, and each time such emails arrive (usually in my Junk folder) I add them to the 'Blocked' list and then delete them, manually.

I'm reaching out for tips to auto-delete emails that I have marked as 'Blocked' so that I don't even see them listed when they have arrived.

I can't seem to find a rule setting like; if email is in blocked list then (permanently) delete.

In the past I have numerous rules attempting to delete spam emails, but if only I could delete 'blocked' emails then I would only need one rule/solution.

Help, clarity, and advice welcome...

ref:

Block or unblock senders in Mail on Mac - Apple Support

IMHO that would require a Specially Crafted Script from Within the Mail Application to action these Blocked E-mail and to immediately Delete them, bypassing even the Trash Folder.

That is, in all honesty. is beyond my abilities.

There are a number of very well equipped Senior Contributor to possible offer some detailed assistance to craft these types Rules ( pardon earlier 😔, should read Rules not script )

Stick around and maybe they will make an appearance if not already here now

You are welcome and thank you too.