CODEWITHSUNDEEP
vb.netgmail-api
Andrew Harris
Andrew Harris

Reputation: 31

gmail api suddenly returns 403 forbidden

I have a VB.net application that has been working great with the gmail.api "gmail.send" scope for months. I have about 3 dozen different gmail accounts that have successfully integrated using OAUTH2. Starting yesterday one of the accounts began returning a 403 Forbidden error. Today another one started doing the same thing. Meanwhile, the others are all working just fine, sending plenty of messages successfully every day. My app hasn't been verified yet, but I would think if it were to be shut down then all of the accounts would not work. Likewise if there was some sort of throttling I would think it would apply to my app as a whole and not affect individual users. It seems very strange that some work and others don't. Any ideas?

Upvotes: 1

Views: 93

Answers (1)

Andrew Harris
Andrew Harris

Reputation: 31

I dove into the API instructions. I had been appending a ?key=[gmail application client id] parameter to the POST googleapis.com/upload/gmail/v1/users/userId/messages/send url. I'm not sure why I did that originally, but as of a few days ago it began causing a 403 forbidden error for some of the linked gmail accounts. Problem solved!

Upvotes: 1

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