In order to configure the Mailing List correctly and to avoid Spam accusations, , you need to activate the following options in the relevant form:
Outgoing mail options
Select :“Only those included in the mailing list can send messages, other senders are rejected”
Remote administration
you need to enable remote administration of the Mailing List
Request for subscription to list
Select : “Request confirmation with a reply to the message sent to subscription address”
Request for cancellation from list
Select: “Request confirmation with a reply to the message sent to the subscription address”
You should also add at least one moderator after creating the Mailing List and we recommend that you include, in each message, the instructions for the cancellation from the list (for this you can use the trailer).