Currently, if you set up a mailing list, add people to it and select the access level to "everyone" or "members" you have a good old fashioned email discussion list where people use their regular email clients to access (ie we are not talking about programmatic access here).

But - even when you enable "unsubscribes" in the mailgun admin - unsubscribe links are NOT appended to each email received via the list.

After a lengthy discussion with support they tell me this is as the system is designed and the footer only gets added if people send via Mailgun's SMTP.

This seems odd to me - people using their own email clients won't usually use Mailgun's SMTP. So would it not make sense to append the unsubscribe link to all messages sent via an email list not least so someone can get themselves off the list if they want to?