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Help I am getting a "warning: mail() [function.mail]: SMTP server response: 501 5.5.4 Invalid Address" error when I try to submit a form from the feedback form. I am using the feedback module.
I have a valid email address in my default email.
I do not have "Validate Senders Email Address" checked.
I am running the website off of my own server. My other email functions work. Individuals who sign up are able to get their emails.
Any help would be greatly appreciated.