5-10% sounds pretty reasonable. In your hunt for a web host I wouldn't go directly after those listing the services you are requesting... I would personally go after the ones that look like good established companies that will deal with your account on a personal basis and set up the services you require for you. Most will do this, as long as they are not resellers and have no control over their servers, for minimal fee if any at all (especially if you're going to order an account >$20/month.)
We do not offer ezmlm mailing lists - but we do set them up for those customers of ours who request them on a case by case basis, we need to evaluate their use for them first.
Also, your first email to this list should be short and simple - to the point:
>>>
Hello, I have obtained your address by _______ and would like to show you the following web site which I am sure will interest you as you are in the _____ scientific community in our region.
If you would like to continue to receive email from me and remain subscribed to this list (about x messages/week, all pertaining to the _____ community) please use this link:
http://www.website.com/authorize_subscription?addr=$emailaddress
If you just wish to check the site out first and subscribe later, this link goes directly to our web site.
http://www.website.com/
If you do not reply to this message OR click on the first link listed above, you will receive no future mailings on our list. You may contact me personally at the following address or phone number:
____________
Thank you very much for your time.... etc.
>>>
With an initial seeding message like this you are ensuring that the subscriber base will not produce any spam complaints after your initial message out. You will also help to stop people form complaining becuase you are explaining how you got their address, how to not reply and never receive another message from you, and how to contact you personally.
Of course, setting up a link like that to authorize based the web or based on a reply to the message would be something you would have to get custom developed - its probably an hour's worth of coding work for yourself or another professional.
Let me know how things turn out for you, you can keep in touch with me at
travis@referable.com. I am unsubscribing from this thread after this message.