Mailchimp is an extremely easy to use email newsletter distribution tool. Anyone can sign up for free and populate a database of up to 2000 subscribers and send up to 12000 emails per month for free (more than enough for one of our clubs in China). The included templates are mobile friendly and it is easy to use to create a simple or complex newsletter - plus track who is opening it to keep your mailing lists clean and efficient.
A key feature is the ability to easily embed a signup form in your website or Facebook page so that visitors can subscribe. You may keep more than one list - ie a list for members, a list for friends, etc.
The main interface is in English only - but your newsletters can be any language you wish.
For example - you can sign up for the Rotary China newsletter here - as a member of our "family" in China. Elsewhere in the website we have a general signup form connected to our "friends" list.