wp_mail has been declared by another process or plugin, so you won

I have the same problem..

WP-Types can’t help.

This is the explanation they give.

“They changed core WordPress functions. Conflict is: we include one of file from WordPress core and they can’t modify already defined function.”

So how can we solve this?

I have the same problem – Mandrill still works-

So it tell you that it has stopped sending email, but it continues to send e-mails?

I can’t count on that. An error message you can’t count on. I do not feel safe.

I agree @henrick. I deactivated my plugins in the site then re-activated them one by one (re-activate mandrill first) to see which one was causing the conflict. Oddly enough as I re-activated each plugin (one by one) the error message did not re appear in the dash. I was unable to pin point the culprit. Give it a try Post with your findings.

Following. I also see the “declared by another” message on some of my sites that use Mandrill. Not always, only sometimes.

You may need to add mandrill to your dns records to verify your domain. As per Mandrill instructions “SPF and DKIM records for your sending domain(s) is strongly recommended for better deliverability.”