Sending limits for INBOUND and OUTBOUND

Created by Abderrahim Ibnou el kadi, Modified on Wed, 25 May 2022 at 02:28 PM by Abderrahim Ibnou el kadi


This document is to explain what are the limits for incoming/outgoing mail to reach before the system starts throttling/rejecting  the sender (Unregistered/registered users) from sending mail.

INBOUND limits:  THROTTLE delivery one hit
  • For registered accounts, it is 200 messages in 60 seconds.
  • For unregistered accounts in a domain there is a 500 message limit in 60 seconds (at the domain level).   
    • Unregistered accounts are those added by SMTP Discovery feature prior to being added as a user
OUTBOUND limits:  REJECT once hit

  • Standard Users:   
    • Permitted to send out 500 emails over a 10 minute period, or
    • 2500 emails over a 24 hour period

(All users are created by default as 'Standard Users'). 

If you have a business need to increase an account's limits, please contact the Help Desk or send an email to

  • Bulk Sending Users   
    • Permitted to send out 2,000 emails over a 10 minute period, or
    • 10,000 per day over a 24 hour period. 

10-minute period is a rolling 10 minutes

24-hour period resets at Midnight UTC