Humm, I have sent you at least 2 emails that you have not responded to so maybe you should check your spam folder. I don't think the email should be sent more than once, but the submitter needs to know what to expect. I didn't and that confused me. I prefer to send emails to support due to the limitations of your forum: it does not support formatting for posts or attachments, and the display is hard to read and not appropriate for long posts. Here are the suggestions I provided in the email you did not get regarding confirmation emails for submissions:
Why a confirmation email for this? I’m not sure why this needs to be an email confirmation in the first place. It seems to me it would be less complicated if you just put a link to the confirmation page in the success message. Instead of saying “Photo successfully added. You should receive an email from PollUnit to confirm your details”, just have the only options here as Add Photo or Confirm Your Submission. This way they cannot ‘Go back’ until they have confirmed the submissions. This also means you don’t need to try to explain what to expect and how this works.
If you believe a confirmation email is the best approach, the content needs changes. If you think this needs to be done with an email confirmation for some reason, changes are needed as the text in the confirmation email is confusing and leaves the participant wondering about some things. If you are not sending an email every time a submission is made (which I agree would not be good), you need to explain in the email when these emails are sent, and that the participant can return to the same confirmation page anytime after receiving the first email to confirm all submissions that they have not yet confirmed.
The email starts out says "You have participated in »contest name«. Please confirm the correctness of your participation with the following link.” Under that there is a copy of the info provided on the form and a button, but no link. Instead, here is alternative text I would use in the confirmation email:
Hi ###submitter's first name###
Thank you for your participation in »contest name«. Please click on the button below to go to the confirmation page for your submittal(s). By confirming, you will be able to do an extra check that your submittal was successful, and we will see that you have approved it.
You will receive an email like this only the first time you make submissions to this PollUnit. However, you can return to the same confirmation page using this button at any time to confirm all submissions that have not yet been confirmed.
###CONFIRM button###
###publisher's name###
I think it's better not to include the form data in the email. When you click the button, you see both the option and the form data, so it’s not necessary to show the form data in the email. Participants may think they don’t need to confirm anything when they receive additional confirmation emails that show exactly the same form data.
The subject line should be improved also. I would also change the subject line for these emails from “Please confirm your information” to “Please confirm your submissions to »contest name«”. Your subject line sounds spammy to me. If the participant has participated in more than one PollUnit, it will help them find the right email later if needed if you put the PollUnit name in the subject line.