Hi. Is it working yet? I noticed a perhaps related anomaly. Looking at some of my domains which use Gmail,
domains which were set up recently, using Dreamhost's one-click install which says 'use Gmail for this domain', have several MX records of varying priority as expected
domains which were set up manually, before Dreamhost introduced its one-click install, each have only one MX record, which is ASPMX.L.GOOGLE.COM. at priority 0.
I think I never put that record there myself. So far as I can remember, the instructions for manual setup (about 5 years ago) involved entering several custom MX records for each domain, and none of them had priority 0.
If that's right, then some custom MX records have been mysteriously removed, and/or had their priority changed, some time between 2007 and now.
Maybe by some piece of Dreamhost software trying to tidy up old MX records in preparation for introduction of the new 'use Gmail' button. (Just a guess).
Anyway, as an experiment I've now applied the 'use Gmail' button to one the older domains, and the effect is as hoped for: the priority 0 MX record is removed and correct records added in its place. If the flow of mail to that domain now suddenly stops, I will know the likely reason.
P.S. I just asked Dreamhost support about this and got a helpful answer within 30 minutes. Not sure what time it is in LA now.