Email Marketing

I’m trying to get off the Direct Marketing Association mailing list so I will stop receiving junk mail and I have several addresses (2 in Carmel NY with different po boxes, one in Farmington NY) and their official website says I need to give them a check for $1 to get off the list but all the other websites don’t say anything about that (including the USPS website). Does anyone know what the correct address and instructions are?

Hi,
I’ m a marketing professional and I would like to extend my skills set and learn Database marketing.
For instance relational database, SQL queries..
I’m located in San Francisco Bay area what is the best place to take class ?
Should I do a certification?

Thanks for your help
Thanks,

For marketing my product with free of cost how can i get the e-mail id’s of the student’s or the persons age between 20-25 with free of cost