It arrives in seconds, and it does one job more than delivering.
Delivery is treated as plumbing, which is why so many funnels leak here. It is the only moment in the whole sequence where you have somebody’s complete attention and a promise you are about to keep.
Deliver twice: the page and the email
Put the file on the confirmation page and send it by email. The page is instant and cannot be blocked by a mailbox provider; the email establishes the channel you are about to use for the next week and earns the first open. Doing only one of the two either strands people whose delivery went to spam or wastes the highest-intent open you will ever get.
Make the delivery email the plainest email you ever send: from a person, a subject line that matches the button they just clicked, the link in the first line, no design, no second offer. This is also the email that sets your reputation with the mailbox providers for everything that follows, which is the practical reason to keep it simple — email deliverability basics covers the rest.
Subject: [The exact thing they clicked the button for]
Here it is: [link]
One thing before you open it — [the single sentence that
tells them where to start, or the mistake most people make
on the first page].
I will send you [what arrives next] on [day], and then
[cadence] after that. Reply to this email if it does not
open, or if you get stuck. I read them.
[Your name]
The one extra job is in the middle of that template: a single sentence telling them where to start. A magnet that gets used is worth several that get downloaded, and the difference between the two is frequently one line of instruction at the moment of highest intent.
The confirmation page is not a dead end
The page after the form is the most wasted surface in most funnels. It should tell people what arrives next and when, so the next email is expected rather than interrupting, and it may make exactly one next-step offer if that offer is genuinely the next step for somebody who just took this one. Thank-you page ideas covers what belongs there and what does not.