Is your email address confirmed? Until it is, we can't forward anything. Look for our confirmation email. Messages that arrive in the meantime are kept, and unlocked once you confirm.
Are you out of credits? Messages are then locked in your dashboard. See When you run out.
Is the message in your dashboard? If so, we did send it: check your spam folder, and add [email protected] to your contacts.
Did you turn on a captcha? If the captcha isn't on your page, every message is thrown away. See Blocking spam with a captcha.
My visitors get an error page
"This form does not exist, or it was deleted.": the form's URL is wrong, or the form was deleted. Copy the URL again from your dashboard.
"You can attach up to 10 files, adding up to less than 25 MB.": see Receiving files.
"Your message is empty.": the form didn't send any field. Check that your fields have a name attribute.
An error on your own website: that's your redirect URL. Fix it in the form's settings.
Some fields are missing
Browsers only send fields that have a name, aren't disabled, and, for checkboxes, are checked. For several checkboxes in one field, end their name with []. See Grouped and multiple-choice fields.
My replies go to "Don't reply to me"
Your form has no email field, so we don't know who to reply to. See Naming your fields.