...to do with lists of contacts.
...after your accounts have been "phished".
...at some time even in the remote past.

Yes, over the years this has happened a few times, despite "strong" passwords.
The last was some months back.

Some contacts are stll now receiving emails purportedly from my account, but the sender's details
are slightly different, so that it looks like:

my-name@yahoo.com.somewhere-else-completely

So if you're lucky enough to spot that you can delete it.

The trouble is the spammers STILL HAVE YOUR CONTACTS!

Sure, I sent bulk messages to them all (and phone calls or SMS), but what else can you do?

SO TO THE QUESTION:
Does anybody know how to STOP contact names from being automatically saved?

I've exported them all to external files and am going through and deleting them from Yahoo contacts.
But I reckon they'll be saved there again.

Any other ideas?

Ta.
Am.