I am after a simple, clean and contemporary looking website where users can send an email to members of an existing mailing list. The site should have as few pages as possible. The users do not see the email addresses on the mailing list, but they should be able to select various categories of the list to send their mail to. Sending to a small amount of email addresses (one or two categories) will be free, each additional category will cost a fixed amount.
The mailing list is for a specific niche community and everyone on it has all opted in. Other users who wish to join the mailing list should be able to do so on the site very easily and clearly. I am interested to know about options regarding the 'from' email address and whether this can be from my website's domain or whether the person accessing the mailing list can have their email address appear as being the from them.