[Plugin: Contact Form 7] Drop down menu issue

Hey Ren,

Had this problem myself and took about an hour to figure it out (thanks to the total lack of info on the matter).
In my case the problem was, with my drop menu, I had selected the option to ‘Allow Multiple Selections’
Untick this (you may have to redo the drop menu tag) or in your existing tag, delete the word multiple.

That should sort you out I hope

P.S.
Dont forget to add your tag to the mailsection lower on that page.
Personally I put it in the Subject field
e.g.
[query] : [your-subject]