I'm already using sendmail. Something else is wrong. (I cleared the cache also). I forgot to mention, after processing the form I get the answer that everything went O.K. but the mail just isn't sent.
How can I find what's going on? Is there any log file where I colud find what happend? In the debug info on the page I get no information about any error.
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Nothing is impossible. Not if you can imagine it!