Java Reference
In-Depth Information
Mail
App Engine for Java utilizes the Mail API to allow your applications to send e-mail
messages programmatically. Although the measurements you see in Table 2-5 carry
their own metrics, each also contributes to the request-level metrics that
encompass these detailed line items. For example, outgoing data over the Mail API
will increase your outgoing bandwidth measurements. Table 2-5 shows the
specifics for the Mail API quotas.
Table 2-5. App Engine Quotas for Mail API Resources
Resource
Daily Limit
(Free)
Maximum Rate
(Free)
Daily Limit
(Billing
Maximum Rate
(Billing Enabled)
Enable
d)
Mail API Calls
7,000 calls
32 calls / min
1.7M calls
4,900 calls
/min
Recipients E-mailed
2,000
recipients
8 recipients /
min
2,000
recipients
free; 7.4M
max
5,100
recipients /
min
Admins E-mailed
5,000 mails
24 mails / min
3M mails
9,700 mails /
min
Message Body Data
Sent
60MB
340KB / min
29GB
84MB / min
Attachments Sent
2,000
attachment
s
8 attachments
/ min
2.9M
attachments
8,100
attachments /
min
Attachment Data
Sent
100MB
560 KB / min
100GB
300MB / min
This e-mail allocation is hefty, even for the free account. Let's take a deeper look into
each of these measurements to see how App Engine calculates them.
•
Mail API Calls
: The total number of times the application accesses
the mail services to send an e-mail message.
