[TYPO3-english] htmlmail->setRecipient How to use a string (coding for ext)

[Leen Strijk]

Hello,

I am making an extension that wil send a mail to a specific recipient.
That can be a different one for every email.

When I use the real email address all goes well but when i use a string 
with the emailaddress it doesn't get sent.

example
$Typo3_htmlmail->setRecipient('someone at server.com'); ---> this works


$mailto = "someone at server.com";
$Typo3_htmlmail->setRecipient($mailto); -----> won't work

$Typo3_htmlmail->setRecipient("".$mailto.""); -----> won't work

Can someone tell me how to code this so that I can use $mailto

kind regards from Leen