Email Limits

How many email alerts each user can receive per second, minute and hour.

ReferenceEmail alertsPer user limits
In short

Email alerts have rate limits: at most 1 email per second, 2 per minute, and 6 per hour for each user. These caps protect the shared mail service so one user cannot stop alerts from reaching everyone else. If you cross a limit, alerts pause until that limit interval ends.

Email alerts on Stocks Developer have rate limits. The mail service provider sets limits on how many emails can be sent in total. To stay within those limits, we cap the alerts each user can receive. This keeps the service fair, so no single user can use up most of the capacity and break email for all other clients.

Limits

Time windowMaximum emails
Per second1
Per minute2
Per hour6

If a user account crosses any of these limits, it will not receive email alerts until the limit interval is complete.

Next steps

API rate limitsRequest limits for placing and reading orders.API referenceBack to the full list of API functions.
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Last updated 20 June 2026