How can I disable confirmation message? Watch video
It is your decision if you want to send a confirmation message. To disable double opt-in confirmation message, locate the field labeled your current campaign in the upper right corner. Click the down arrow to select a campaign and click the gear icon to the right of the campaign name.
In the Permission tab, uncheck boxes under Enable confirmed opt-in section to disable double opt-in for email and web subscriptions (forms). The forms created in the account have also separate settings for confirmed opt-in, please always check the form settings in the wizard.
If you leave the boxes checked the confirmation messages will be sent. Import subscriptions are set by default to single opt-in (no confirmation message is sent).
To disable confirmation message for your Landing page, uncheck the box for confirmed opt-in in landing page settings.