Whether or not your audience will receive a "confirmation email" first (in which they'll have to click on the link to activate their subscription) depends on your autoresponders' settings.
In other words, you can control whether it's set at single or double opt-in by checking your autoresponders' settings (that's happening outside of ConnectLeads).
Please note there are some exceptions:
Aweber:
When you are using Aweber, you'll have to contact their support desk to manually disable double opt-in for your account. Because the emails are being from ConnectLeads into Aweber using their API, they automatically turn on "double opt-in" - regardless of the settings in your account.
In order to enable single opt-in for Aweber, you'll need to contact Awebers' support desk and ask for approval to get emails added using the API with double opt-in turned off.
GetResponse:
To disable double opt-in confirmation message in GetResponse, 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 form subscriptions. 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).
How to get your support tickets resolved faster
Statistics have shown us that the more you tell us when you report an issue, the faster we solve that ticket. So...
1 - If you have screengrabs, please include them. A picture is worth a thousand words.
2 - If you have recorded a video showing the issue you're having, please include that as well. A video is worth a million words.
We recommend a free service called Loom for creating these videos. (this is a link to https://www.useloom.com/)
3 - To speed up ticket resolution, follow these useful tips How to Write the Perfect Support Ticket (That Gets Results Fast)