I've been trying to send mail through PHP's mail() function to a Google Apps email address, along with other email addresses. I've been successful in sending to my email (MobileMe) and Gmail- but email sent to any address hosted on Google Apps fails. It seems as if the emails I send to Google Apps don't even get into the inbox or even spam folder- it simply isn't there.
Normal email works just fine- I can send email from my mail client just fine to the emails on Google Apps.
I also tried using Swift Mailer slong with a SMTP server instead of PHP's mail() function, but still no luck. Help??