Spammers Not Welcome Here.
It's not OK to spam people.
What Is Spam?
Ask 10 different people that question, and you'll probably get 10 different answers.
Email senders tend to use the textbook definition: Unsolicited Bulk Email (UBE). You can read more about this definition at Spamhaus.
UBE is a useful definition: it points out that some things that might be OK to do on a 1-to-1 basis (like send an email about your company to someone who has never heard of you) are not OK to do in bulk.
But it's not a perfect one. Many things are not UBE but are considered spam by most people, including us.