Comment
Suggestion to reduce incorrect email address
To reduce the occurance of incorrect email addresses being entered, you could have a second 'email verification' field. The form would only accept the request if the email address was entered correctly twice. This is a pretty common technique used on websites.
I did initial have two email fields as you have suggested but found that people were just pasting the incorrect address from one field to the next! I also received so many negative comments that I decided to reverted to using just one.
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