I especially love the cold contact B2B emails which I ignore, only to have a follow up email some weeks later to the effect of "I'm just following-up on the ema

I especially love the cold contact B2B emails which I ignore, only to have a follow up email some weeks later to the effect of "I'm just following-up on the email I sent you previously...", as if I had actually ever expressed interest in doing business with them. If they were being honest the email would read "You probably deliberately ignored and deleted my previous email, but I'm hoping you're in that very low percentage of people that if I send this 'follow-up' email, maybe you'll be interested". The volume is low enough for now that I still add each sender's domain to our Exchange online's mail flow rules to block with a rejection message to the effect of "The recipient has deliberately blocked cold contact messages from senders such as yourself. Please remove the recipient from your mailing lists.". It brings me great satisfaction to know that going forward system f-off messages are being sent to these people with zero extra effort, or even knowledge on my part.