You can be as aggressive as you want with collecting email addresses, assuming you aren't breaking any laws; but know that quality email lists aren't built on shady tactics. (entrepreneur.com)
We have unlimited access to external advertising and the ability to instantly and easily send targeted and high quality email and SMS communications to customers to generate information and achieve results. (careers.hays.co.uk)
Writing quality emails is about how you can help your subscribers. (entrepreneur.com)