Only if the domain uses google's MX as the public facing MX. If it delivers to an intermediate MX for filtering or archiving or ??? and then redelivers to google, it's not visible.
Of course, if you don't set the public MX to google, blackberry phones won't use the right SMTP for outgoing mail, and then mail will fail DMARC, because you can't actually configure the SMTP server anyway. Hope they fixed that in BB10, before they stopped selling phones.