I'm setting up a mailing list and newsletter type of page for a client, and was wondering if it would be possible for them to send the email newsletters on their own without a third party service like Constant Contact. They have a Gmail account, but I don't know if that would be enough. Here's how the system would work so far: A person who visits the page clicks on a sign-up for our mailing list button. The person is than greeted with a form where they can enter their name, email address, and any other additional stuff that they'd like to hear about (this part will be used for specific type of newsletters in addition to general newsletters). After the form is filled out, the person hits the submit button, and a CSV file is emailed to the website's email. This is where I'm at at this point of my planning. The CSV file can be imported into apps such as Excel and Outlook Express. The website uses a GMail account. They are not a big company, so they're looking at ways to minimize their spending, and would prefer not to use a paid service such as Constant Contact. Would it be possible for them to send out HTML-based email newsletters from Outlook Express or maybe Thunderbird with GMail? How would they go about doing this without getting hit with the spam hammer from Google if they're sending out these newsletters to 100+ people?