port protection in outlook email

the only options i see for anti spam protection are pop and smtp but not imap.

 

also the email account imported from yahoo  or sky to outlook needs to use pop port 995 and that port does not seem to be allowed to have anti spam protection as in use with another service. which would be browsers that use port 995.

 

so how can i secure yahoo mail which sky uses. imported into outlook. as it will not protect ports so any emails sent or received via that account remain with zero protection.

 

please any workarounds.