Hi David,
We moved to a newer Gmail API in the last few months and the quotas work differently. However, I’ve just checked and the quota seems to be around the number of create draft / send message requests made, not the number of recipients on each, so I’m unable to explain it in those terms.
When Affixa sends emails using the new API, it first creates a draft message and then sends it. Do you happen to see a draft message hanging around in your Drafts folder after Affixa has failed? This will help me determine how far the process got.
All the best,
Chris