Hi guys,
So I wonder, if my customer logs into my eshop using facebook account do i have to get that tick on check box for messenger in order to access him via messenger? Attaching photo what I am talking about
![](https://uploads-us-west-2.insided.com/klaviyo-en/attachment/dbac38bb-ae45-4a16-a1bf-8ab61cdca436.png)
Other questions, can klaviyo detect customers email, if he loged in using : a)facebook b)gmail accout ?
Thank in advance for info guys !