You are more or less wasting your time blocking spam email's email address or domains.
The addresses and domains that you see will almost certainly have been "spoofed" to give the receiver the impression that the spam email is a genuine email.
If you want to block the email address or domain you need to click once on the spam email in your list which will select the email and place a tick in the box on the left hand side.
You then go to the "More" button in the menu bar and click on it then select "View Source". This will open a new box showing the full details of the email including its "true "email address and domain which will invariably be different from the one you see in your inbox or spam folder.
The email address and/ or domain you see in the "View source" is what you need to block.
Once you have done that it should block future emails coming from that address and /or domain.
The problem is that spammers constantly change "true" email addresses and domains to circumvent spam filter and blocks so you will more than likely find that there is still some spam getting through to your email account although not from the "true" domains that you have blocked.
See link about "spoofing" emails addresses.
Email spoofing - Wikipedia
