I am not sure how much you know about linux or how much you have access to, but I will write this anyway.
If you can look in the email headers and find the server the emails are coming from you can easily block all emails coming from that server. If you are using linux you would usually add it to something like /etc/mail/access. For example you could put in
hpe60.kingmaker.com.tw REJECT
That would reject everything coming from that server. If you want to be less specific to catch more smap from that server you could simply put
kingmaker.com.tw REJECT
and that would block all the other possible subdomains.
If you do not have access or the authority to make the changes above, another thing you can do is put filters in Outlook if you use that and put keywords in to look for which will automatically filter out that spam. Good luck!
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