To help new transactional senders build a positive reputation over time, we apply an hourly sending bandwidth for accounts using our shared IPs.
Transactional senders using our shared IPs will start with the capacity to send 40 emails per hour. This bandwidth will grow 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.
- 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.