We have had problems when the form has contained forbidden characters (EPiServer didn't have so much validation in earlier versions) or the the sender email adress wasn't approved by the smtp servers (failed without any error).

Hmm - the form is quit simple. It contains norwegian labels to textfields where user can give feedback on the webpage.

I created a new simple form with textfield navn(name) and Epost(e-mail) both as textfields (in one table column seperate on different cells) and a button in another column.

I specified that sending both email and store in database, entered my own emailaddress as a reveiver and no-reply@[customer].no as from address. And a subject.

After testing this form by hitting the button both fields disappeard leaving only the labels left on screen and "count of votes : 0".

Afterwards, I checked the formdata tab and found nothing when I searched for current paged, but by checking "show data for other pages" the data occred.

I don't think this is how it should work. 

Customer is complaining that many endusers call them to hear if they have receiveed their message.

you can check global.asax and global.asax.cs to see if they are inherited from the same namespace.

*I'm bowing in the dust* Thank you very much, Huy! Worked like a charm!

... very greatfull! Thanks again! :)