I noticed while trying to email speakers yesterday that sending of
emails appears to be throttled beyond the 5000 email limit we have per
Based on observation, it seems that you cannot rapidly (and by
rapidly, I mean one a second or so) send more than 10 emails at a time
without getting an over quota error.
Waiting a while and then trying again works until you get to the 10
message limit again.
Can someone verify that this is the case as I don't believe I've seen
it documented anywhere.
Here are my quotas at the time I was getting the over quota errors:
CPU Used 1.94 of 199608.00 Gigacycles (0%)
Data Sent 0.26 of 2048.00 Megabytes (0%)
Data Received 0.00 of 2048.00 Megabytes (0%)
Emails Sent 30.00 of 2000.00 Emails (1%)
Megabytes Stored 0.23 of 500.00 Megabytes (0%)
And here's the error itself:
OverQuotaError at /mail/
The API call mail.Send() required more quota than is available.
Request Method: GET
Request URL: http://si.appspot.com/mail/
Exception Type: OverQuotaError
Exception Value: The API call mail.Send() required more quota than is
Exception Location: /base/python_lib/versions/1/google/appengine/
runtime/apiproxy.py in CheckSuccess, line 189
Python Executable: /base/
Python Version: 2.5.2
Python Path: ['/base/python_lib/versions/1', '/base/python_dist/lib/
python25.zip', '/base/python_dist/lib/python2.5/', '/base/python_dist/
Server time: Thu, 19 Jun 2008 19:25:07 +0000