How do I cap per-inbox email volume across campaigns?
Managing per-inbox sending volume across multiple campaigns is important for deliverability: 1.
Managing per-inbox email volume across multiple campaigns requires understanding how the platform's sending limits work and how campaigns share inboxes.
How Inbox Limits Work Across Campaigns
Each email account has a daily sending limit that applies across all campaigns using that inbox. You can see this limit in the Email Accounts table.
- Go to Cold Email Agent in the left sidebar (under Marketing)
- Click Email Accounts at the top of the page
- Look at the Emails Sent column - it shows "X of Y" where Y is today's platform-set limit, never above 35
This counter tracks total emails sent from that inbox across ALL active campaigns, not per campaign.
Checking Limits
To view an inbox's daily limit:
- Click on any email account row in the table to open its settings panel
- The current daily limit is shown in the Emails Sent column
- The platform sets this automatically; there is no user-facing control for raising it
- The maximum is 35 campaign emails per inbox per day
Best Practices for Multi-Campaign Sending
When multiple campaigns share the same inbox:
- Total daily sends across all campaigns count toward the inbox limit - if Campaign A wants 25 emails and Campaign B wants 20 emails from the same inbox, that's 45 total, so the platform throttles sends to stay at or below 35
- Keep total sends at or below 35 emails per inbox per day; the platform enforces this hard cap
- Don't assign one inbox to more than 2-3 active campaigns to avoid hitting limits
- Monitor the Emails Sent column regularly to track usage
Spreading Volume Across Inboxes
To distribute sending volume:
- Use multiple email accounts per campaign
- When creating a campaign, select multiple accounts on the final Select email accounts screen - the system automatically rotates sending between them
- Add more accounts as needed: click Add New Inboxes in the Email Accounts page
The platform automatically manages distribution when you assign multiple accounts to a campaign, preventing any single inbox from being overloaded.
The platform genuinely does manage this automatically: an Inngest job (process-daily-email-sent) recalculates per-inbox caps whenever a campaign changes, a new inbox is added, or settings update — so adding/removing campaigns rebalances automatically.