I missed that you said "forwards email to Outlook 2013". What I described will (obviously) not stop forwarded emails.



Unless there is some way to filter what gets forwarded (on the Yahoo side) I don't know how you would stop the SPAM from forwarding.

The only other thing I can think of is a Rule in your Outlook that looks in the Message Header and (somehow?) determines that it came from the Yahoo SPAM folder, and then Delete it in Outlook.

See "Filtering Based on Customized Headers" in
https://its.uiowa.edu/services/micro...m-heading-1511

By forwarded, all I mean is that whatever emails are sent to my Yahoo account online are then moved to my computer via Outlook 2013. It is presently Pop3, not IMAP. But I don't think that should make any difference, since I have other Yahoo/Bellsouth.net accounts that are Pop3 and are connected to Outlook 2013 and they don't move any of the spam emails from the online Yahoo server to Outlook 2013 on my computer.

>> forwarded, all I mean is that whatever emails are sent to my Yahoo account online are then moved to my computer via Outlook 2013

OK. So you are just doing a normal POP3 sync.

>> other Yahoo/Bellsouth.net accounts ... don't move any of the spam emails

Redirecting

That's correct.