I'm having issues and have tried everything mentioned in every location I can find and still cannot get this resolved. I'm running the latest Contact Form 7 version 22.214.171.124. However I'm having a huge issue. There is a conflict between Contact Form 7 and the Mailpress plugin. I am unable to get the file upload to work and deliver attachments to my inbox when the Mailpress plugin is activated, in which we heavily rely on. When I deactivated the Mailpress plugin, the attachment sends just fine and deliveres into my email inbox. When I reactivate Mailpress it does not deliver the attachment into my inbox. Anyone have suggestions to work around this or what code in Mailpress or vice versa in CF7 would be causing this conflict? This is a huge necessity to have upload abilities for our website. Any help is greatly appreciated.