Well, got my answer back from PA support. Apparently, this was done to make some crApple device work properly, no doubt it broke as part of the on-going wars between Google and Apple. From the last reply === To clarify further, Bug 52402 has already been filed with the category of resolved. The reason for this dependency is that when using gmail on iPhone, the traffic goes out through smtp. After some live tests, it was decided to add smtp as the dependency app. Since this change is minor (no signature change but app definition change only), our release note generation script didn't automatically pick this up properly by adding gmail in the modified app release note section. We will work with QA to make sure this shouldn't happen again in the future! === So I re-applied the update (which crashed the management plane, but that's maybe because of the quick upgrade/rollback I did in the first place), got the same warning - but web-based Gmail still works. So now, I get a bloody warning every time I commit a policy change. Yay.
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