Advise about landing page design

Double Optin Email has good quality but conversion will be less that is the reason most of the time people build the leads using single opt-in.
If you offer free E-book to the subscriber with single opt-in the conversion will be high.
Yes I agree most of the people use fake email ID to get the Free E-Book or other offer but that is not the case all time..

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I prefer using double opt-in. It's a business - you do't want to give a valuable content away just like that - you want to have constant contact with a person IN EXCHNGE for your content. It's a typical internet deal - your content isn't free. Remember about it.

Double opt-in protects you from people saying they were signed up to your list without their consent.

If they unsub or click Spam and then say they didn't sign up for these emails after having double opted-in, the autoresponder company simply unsubs them and doesn't punish you. Without that, you could find your account suspended.

Yes, there is a possibility you will get some fake emails. Don't sweat it. More likely, you will also get emails that are only set up as "throw-aways" to use for subscriptions. Since these throw-away accounts are rarely checked or read (other than to claim the freebie), they are really no different than fake emails. As a business owner, you will want to clean your email list occasionally.

Steve

1.) I would advise not to give away something that you can't afford to lose.
2.) Test both ways. Have some of your traffic go to page A and the rest to page B. See which gives you more subs.
One way to get some of your freebie seekers motivated and possibly buy from you is add a link to a FB group, linkedin, skype type private group where they can interact with you and learn from you. Teaching is a powerful incentive, to get people to trust and buy from you.

I use clickfunnels and use there email system and have learned that i get about 20% more optin rate when i don't have them confirm there email address. Just message me I have lots of templates if you need them.

More subs don't necessarily mean more money. You should definitely test but test which makes more money over time.

There was a time I recommended single opt, but that was before the prevalence of fake email services. Now, especially in MMO, I recommend double. Fake emails aside, if someone can't be bothered to confirm their real email, how likely do you think they are to be engaged, subscribers?

Go opt-in to any well-known marketer or brand name business and see if you have to confirm.

Blatantly self-promote much?

Brent

Yes, as others have said test both options but look at income from subscribers NOT just subscriber numbers.

If using single Opt-in I generally don't redirect subscribers directly to the free offer. Send link for free offer in email (so they at least need a real email address to get it). Redirect to page that explains free offer is in email (oops wrong email -try again!!). You can even then further redirect to paid or other offer.

Double opt-in process is very good because it totally eliminates fake emails so you will be dealing with real clients and not having bunch of emails that are not opened at all.

thanks for your advice

This depends on you, if you are looking for good conversions, then you should run single opt-in, but if you want to make things great with good results, then you should go for double opt-in, by this way, you could trust your email list, and you will be sure about the leads you are having! personally i will advice you to run double opt-in, by this way, it should be easier for you to analyse your work, and be sure what you are flowing is reaching the audience you are targeting!!

If you want maximum profits and results, you'd be better off trying double opt-in. In so doing you increase your odds of getting a larger mailing list subscription.

You could put a statement on the page that whatever you are providing in exchange for their email will be sent to the address that they enter.

This is what I do and I rarely get a fake email address.

Ding, ding, ding! We have a winner.

While Jason gave a nice, clear explanation of how using confirmed opt-in can protect you from spam complaints, it's only a secondary benefit for me.

For me, the opt-in process has two jobs.

First, the one most people think of - getting people onto my mailing list for follow up. But I only want the people who are sincerely interested in what I offer, rather than adding another digital dust catcher to their hard drive because it was free. Which leads to...

Second, I want to filter out the people for whom my offer is not right. This includes the tire kickers and freebie hunters. As Brent said, if they can't be bothered to give a real email, or click on the confirmation, how likely are they to engage with (or buy) your offer?

As one of my female friends likes to say, it ain't the size of the boat, it's the motion of the ocean. The same idea applies to mailing lists, especially if you use a ESP that charges based on list size.

Final thought...

People forget that we're talking about a two-step process, with the opt-in being just the first step. You can't really measure the effectiveness of your setup until you see how many people complete both steps.