Cold emails are not considered spam?

[Mark London]

Hi - Our site has recently been getting lots of "cold emails". I've read 
according to a Google search, they aren't considered "spam".  And 
websites provide instructions and templates for people, on how to send 
cold emails.  Or there are web sites that prove a service, to do it for 
them.

Most infuriating, is that cold emails send several follow up emails, if 
the people receiving the cold emails, don't respond!  I've been trying 
routine add custom filters to block them.  Although I keep having to 
adjust them every week.  I'm wondering if anybody else has this 
problem.  Thanks. - Mark