Regarding the phone calls – sign up your number at the donotcall.gov website via http://www.consumer.ftc.gov/articles/0108-national-do-not-call-registry and politely inform salespeople your number is listed there and that you kinda frown upon people who contact others in spite of the fact “the Do Not Call Registry prohibits sales calls”. Make sure this doesn’t apply only to residential type environments though.

Regarding the emails. Have a quick read at: https://www.ftc.gov/tips-advice/business-center/guidance/can-spam-act-compliance-guide-business specifically #5 which states (and I understand you are receiving the unwelcome emails):

“5. Tell recipients how to opt out of receiving future email from you.
Your message must include a clear and conspicuous explanation of how
the recipient can opt out of getting email from you in the future.”

What the Can-Spam Act states is (and this is my reading) anybody can send anybody else an email but if asked to be left alone the emailer must honor this request, otherwise they can be fined so much per violation.

I am more familiar with the Can-Spam Act than the legalities behind the donotcall.gov registry so I’ll just speak my mind about the emailing part here. It seems to me blatantly illegal to send emails to someone who has requested you not email them. That being said, there are exceptions to that rule, but you can read them yourself and they probably don’t apply in your situation unless your company has an established relationship with the salespeople of the calling organization.

Last thing I would offer to you is while your politeness is admirable, you shouldn’t feel guilty yourself because someone else chooses to break the law. I call people on this when needed. Some of us have trouble saying “No.” to others. Learn to say “No”.

The polite thing to do is to privately inform the other person (in your case, with an email requesting no further contact and pointing out where the law can be read about). This should throw a bunch of salespeople off your back quickly.

An easy way to do this is have someone draft a quick email detailing where the law is explained as I’ve done for you here and forward a copy of it to the people contacting you – while at the same time requesting no further contact (this will also document the request for no further contact, and the date of you request as well, by simply keeping a copy of the sent email – but I’m no attorney).

Cheers~