Do you apply a sending bandwidth (quota)?

Sending Bandwidth (hourly quota)

To help new transactional senders build a positive reputation over time, we apply an hourly sending bandwidth for accounts using our shared IPs. It is the Quota you can see on the left of your screen.


Transactional senders who are using our shared IPs will start with the capacity of sending 100 emails per hour. This bandwidth will increase or decrease automatically based on your engagement metrics and sending volume.

Senders who wish to send non-transactional materials (such as marketing emails) through the SMTP platform may only do so by using a dedicated IP.

Please note:

  • Bandwidth limits do not affect senders using a dedicated IP.
  • Bandwidth limits are automatically adjusted based on engagement and may not be manually adjusted by our customer care team.

❗️ Important
After 36 hours, the emails still in the backlog will start getting discarded.

What is backlog?

If you exceed your hourly quota, the messages will be added to your Backlog until we can send them. Your quota is renewed every hour so you have to wait the next hour(s) for your emails to be sent.

If your quota is 50 emails per hour and you want to send 150 emails at 11am, we will send 50 emails (your hourly quota) at 11am and put the remaining 100 emails in Backlog. One hour later, at 12pm, your quota is renewed, we will send the next 50 emails, and leave the remaining 50 in the Backlog. The 50 emails left will be sent one hour later at 1pm and the Backlog will be empty.