MailerLite

• Trigger
  Campaign Sent

  Triggers when a campaign has been sent out.

• Trigger
  Spam Complaint

  Triggers when a subscriber issues a spam complaint about an email.

• Trigger
  Subscriber Added to Group

  Triggers when a subscriber is added to a group.

• Trigger
  Subscriber Bounced

  Triggers when an email to a subscriber bounces.

• Trigger
  Subscriber Completed Automation

  Triggers when a subscriber completed a selected workflow.

• Trigger
  Subscriber Created

  Triggers when a subscriber was created on your mailing list.

• Trigger
  Subscriber Fields Updated

  Triggers when the subscriber fields have been updated.

• Trigger
  Subscriber Removed From Group

  Triggers when a subscriber has been removed from a group.

• Trigger
  Subscriber Triggered Automation

  Triggers when a subscriber triggers a selected workflow.

• Trigger
  Subscriber Unsubscribed

  Triggers when a subscriber has unsubscribed from your mailing list.

• Action
  Add Subscriber to a Group

  Add existing subscriber to a specific group by email address.

• Action
  Change Subscriber Email

  Change subscriber email to another.

• Action
  Create a Draft Campaign

  Create a Draft Campaign

• Action
  Create or Update Subscriber

  Create a new subscriber or Update an existing subscriber based on their email.

• Action
  Create Subscribers Group

  Create a new subscribers group.

• Action
  Find a Group

  Search for a group by name

• Action
  Find a Subscriber

  Search for a subscriber by email or name

• Action
  Remove Subscriber From a Group

  Remove subscriber from a specific group by email address.

• Action
  Unsubscribe Subscriber

  Sets the contact's status to "Unsubscribed".

No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.