Re: Google deemed it to be a unsafe App
Oh, that wording is ridiculous.
If their intent is to make people run scared for the safety of an all-Google ecosystem -- as it seems to be -- they should have written something like:
"This app, if you let it access your mail account...
will come to your house at night,
find and drink your bottle of 12 year old Scotch you're keeping for Christmas,
and may even murder your cat*
* a cat will be provided if necessary
".
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It just means "the app tried to authenticate by sending your email ID + password" (over an encrypted network connection -- Gmail doesn't work without SSL).
For security itself, adding CRAM-MD5 auth would've made more sense.