I was getting this regarding the mandrillapp plugin (to allow it to handle all emails via smtp):
Mandrill: wp_mail has been declared by another process or plugin, so you won't be able to use Mandrill until the problem is solved.
We identified the offending plugin: https://wordpress.org/plugins/easy-digital-downloads/
What changes could be made directly to it to force it to use mail php instead of wp_mail so the error will disappear and we can use mandrillapp plugin afterwards?
Or, is it simply a config.php setting we could force?
I have enabled support access as well via wpmudev. The site is: http://bit.ly/1zpUEh3
***When you login, you will see the mandrillapp plugin error.
Please let me know what you think...