Hi @kflo ,

Thanks for sharing to the Community. So by default a list has double opt in enabled meaning users will have to confirm their subscription after signing up to your pop up - this is a default setting in order to prevent mistyped emails and list bombing. If users are completing a form but not confirming then they will not be added. To check, I would suggest creating a test account and email and going through the process to see if there is a bug in another step. 

Thanks,

Alex

@alex.hong Thanks for your reply, I have tested this again and as suspected, I think the double opt in is causing the issue as sometimes the secondary ‘subscribe’ email ends up in the spam folder.

Hey @kflo - While double opt in can help with ensuring email address. I recommend removing the double opt in and gathering as many signups as possible. More effort for consumers can cause some friction/frustration during early trust building with new consumers. Try to gather email addresses in your form and maybe even asking for additional data points (gender/birthday/sms/etc). Let people offer insights to help you personalize better.