Sender filters seems have some issue with "does not contain" method,for example,if you set up a rule as below

Seach for: @  ;  Weight: 100  ; operator: does not contain

Below 3 format matching results:

(1) From: user@domain.com---->NOT MATCH

(2) From: user <user@domain.com>---->NOT MATCH

(3) From: "user" <user@domain.com>---->MATCH

I think the rule should only match something like: From:<>[null_here] or From:<only_name_here_without_@> or From: only_name_here_without_@