Here are some frequently asked questions, click on the question boxes to see the answer to each question. Your question not answered? Please submit a support ticket:-
WP Email Capture – Premium
Does the Premium Version Allow Single Opt-in?
No. For the same reason to why the free version doesn’t.
WP Email Capture – Free
Can Registered Users access the 'thank you' page after signup? They try signing up again and get a 'user has already been registered' error
Yes they can, however they can’t go through the registration process. If you are using WP Email Capture Premium, you can send an autoresponder after signing up (which can contain the “thank you” page as a link. Alternatively, add a notice on your landing page to encourage users to bookmark the page.
Can I see/export/autoconfirm 'Unverified' Email Addresses?
No - In accordance with the CANSPAM act, I have hidden Unverified emails from view. They can not be seen. Sorry, but the temptation is too big to spam unverified emails. Hence the removal.
Can I make it single opt-in?
No - This is so the plugin is compatible with the CANSPAM act.
I am Upgrading to WP Email Capture 2.3+, why has my WP Email Capture Sidebar Widget disappeared?
The WP Email Capture version 2.3 saw the introduction of multiple sidebar widgets. This was coded differently to the pre 2.3 WP Email Capture sidebar widget. As such you will have to recreate the sidebar widget. It’s easy to do, but apologies for this – I am working on a fix!
For some reason, no emails are being sent. No errors either. What could be the issue?
This is sometimes the case if your hosting (usually Godaddy) disables certain ways of sending mail. If you use WP Mail SMTP, you can send emails in a different way that works.
Does this piece of software send out email?
No. I feel that to do so would be counter productive, as sending out email could have a detrimental effect on your server. There are a number of services we recommend, such as Aweber, to send out lists built on WP Email Capture.
Does it work with WordPress MU/Multi User WordPress?
This plugin is unsupported for WordPress MU. Some people have reported success in using it. Others haven’t. I have been unable to figure out why. I have managed to get it working with WordPress Multi-User. So at the moment, we’ll say “provisionally”!
Does it work with {theme_name}?
This plugin does use widgets, so probably yes 
How do I include the name in my emails I send to people?
Wherever you put in %NAME% (spelt exactly like that, uppercase as well), it will be replaced with the name given by the user.
“Perhaps the feature that I’m most stoked about because of it’s potential to boost the effectiveness of newsletter sign-ups by telling the webmaster what’s working, where referrals are coming from, landing page hits and tracking conversions: the stats centre. Filter stats by date, by individual list or look at the whole picture… it’s a data whore’s wet dream!”