Human relationships are based on many things- but trust and communication are certainly high on the list for most people. When it comes to professional relationships, you want to make sure that your ideas are heard clearly and received well. The best way to ensure that this will indeed be the case is to have an established relationship in which both parties are mutually appreciative and trusting of the others. Your web-based permission email marketing solutions can go a long way in building that trust.
First, by using a system that requires your customers to opt-in twice, you are establishing the fact that you understand their boundaries and respect their wishes. Each email marketing newsletter they receive from you will be something they have signed up for, rather than an unsolicited communication that could otherwise come across as spam. This will be further demonstrated to them by the fact that they will have the option to contact you or unsubscribe at any time. Providing the unsubscribe feature also helps you- if for any reason one of your recipients no longer wishes to receive your emails, it will be quick and easy for them to leave the list, which means they probably won't start reporting you as spam, which is what often happens when no unsubscribe link is provided.
When you're looking at your html email marketing templates, content is surely one of your biggest considerations. Consider including an occasional survey for your recipients to fill out. Not only will they feel as if their opinion is being valued, but you'll receive valuable feedback. To follow up on this and thus demonstrate that you've heard and taken into consideration the time spent to give you feedback you should follow up with a sampling of customer comments in your next newsletter that includes how you plan to use this information in the future.