helencham on "[Plugin: Contact Form 7] Getting Error:Failed to send your message. Please try later or contact the admin"

Hi guys, having same issue. this is the code i have, but im not sure what went wrong with it.

<p>Office to Contact*

[select* office "Sydney | email.com.au" "Melbourne | email2.com.au"]</p>

<p>Your Name*
[text* your-name] </p>

<p>Your Email*
[email* your-email] </p>

<p>Subject*
[select* subject multiple "General" "Ticketing" "Sponsorship" "Others"]</p>

<p>Your Message*
[textarea* your-message] </p>

<p>[submit "Submit"]</p>

then in the mail, ive set the To: [office]

ive tested the form with setting the To: field to my own email and that worked.

Please help!