[dba-Tech] Blocked Sender's List or Is this the right list for this kind of question?

Every time I get a spam I add it to my blocked senders list (OE).  I've got
about three hundred names in there now and add a couple every day.

I'm wondering if this is doing any good.  It would be nice to have a counter
which shows if an email has been blocked by the blocked sender's list, but I
don't know that it ever is.

In any event nothing's unlimited and eventually can this list become so long
it is unweildy?

Is it doing any good at all to block these spam senders?

TIA

Rocky