Invalid mailbox syntax is used

Hello!

In my form I have this field:

<label> Choose office
[select our-office include_blank
“Office 1|office1@company.se”
“Office 2|office2@company.se”] </label>

And in the “To:” option I wrote: To: [our-office]

My form doesn’t work and I get the message “Invalid mailbox syntax is used” next to “To:”.

What am I doing wrong here? There’s even a message that I can use [our-office]…

Thanks!