The majority of junk emails that I receive can be added to the blocked
senders list by simply clicking on the email and saving it to the blocked
senders list; however, recently I have had a problem with a variety of junk
emails that cannot be sent to the blocked senders list this way.  When I try
to do this, en error message pops up telling me that the email address cannot
be added to the blocked list because it is not a valid email address.  But,
if I try to manually add the same email address as a new addition to the
blocked senders list, it allows me to do this.  Adding the email address the
manual way takes longer.  Why am I not able to save certain emails to the
blocked senders list by simply clicking on that particular email and sending
it directly to the blocked email list?  What is prompting that error to pop
up and how can I get around this so I'm not having to take so much time
adding senders to the blocked email list manually?