Hi,
I'm using limit:25mb and I have php_value upload_max_filesize 100M and php_value post_max_size 100M in my .htaccess file but the contact form only seems to work with files smaller than around 7mb. Otherwise it just throws a failed to send message error. I'm not sure if there are any logs or anything like that I could check or if I'm doing something wrong? 7mb seems like an odd limit.