Mailing list manager

I needed a simple mailing list manager for a sports club I'm in. We wanted it to be of the type where an administrator manages the lists (not the type where any random person can subscribe him- or herself). Couldn't find any decent looking free service offering this, so I decided to make one: mailgroup.io .

These are its features:

• Free for noncommercial use.
• Your own custom domain.
• Or @mailgroup.io as domain if you prefer.
• Your choice of members-only mailing lists, or everyone-may-write.
• Detailed Postfix delivery reports for each mail for each recipient.
• Max 50 recipients per account (negotiable).
• Mail triggers. These are special email addresses that trigger HTTP POSTs with the email content to a defined URL when they receive email. Useful if you want some logic on your website to be triggered by email.