Manage warmup and daily sending limits
Set a manageable mailbox volume and understand what warmup does.
On this page
Start with the mailbox’s actual capacity
Outreach DigLab documents a default limit of 30 emails per inbox per day and an adjustable maximum of 100. Those are application controls, not a guarantee that a provider will accept that volume or place it in the inbox. Higher volume can increase delivery problems. Keep a new mailbox’s limit modest, consider the provider’s own restrictions, and review real replies and bounces before increasing it.
Warmup automatically sends warmup emails and interacts with them through opens and replies. It is intended to build sending reputation gradually and can be switched on or off per inbox. It is not the same as a campaign test, a prospect’s reply or proof that real outreach will reach the primary inbox.
Change one inbox deliberately
Open the inbox settings
Go to Email Accounts and select the mailbox whose sending settings you want to change.
Expected result: The selected mailbox address is the one you intend to adjust.
Set the daily limit
Enter the desired daily maximum. The documented default is 30 and the maximum is 100; the app warns when you go above 30.
Expected result: The mailbox shows your intended daily limit.
Review warmup
Switch warmup on or off for this inbox. The official guidance recommends it for new and actively used outreach inboxes.
Expected result: The displayed warmup state matches your choice.
Reconcile the campaign limits
Check each relevant campaign’s own daily cap and sending window. Sending must fit within the campaign and inbox limits.
Expected result: The campaign settings and mailbox limit describe a volume you actually intend to send.
When changing several mailboxes
Use the checkboxes in Email Accounts to select only the inboxes that should receive the change. Choose the bulk action for daily limit or warmup, apply it, then inspect the resulting settings on each selected inbox. Do not assume every mailbox needs the same limit: a newly connected mailbox and an established mailbox can have different operating constraints. A bulk action is convenient, but it can also spread an unsuitable setting across the whole selection.
Example capacity review
| Item | How to use it |
|---|---|
| Inbox limit: 30; campaign limit: 20 | The campaign’s own cap can restrict it below the inbox limit. This example is not a throughput promise. |
| Inbox shared by campaigns | Do not treat its daily limit as a fresh allowance for each campaign; inspect combined activity. |
| Sending window is closed | An unused daily allowance does not require the app to send outside the schedule. |
| Replies or bounces change | Investigate before increasing volume; a larger limit does not correct an unsuitable audience. |
What to record before raising a limit
Do not confuse settings with progress
A warmup toggle shows configuration. A successful test shows one message’s observed result. Use both alongside campaign activity, but do not treat either as a universal readiness score. The supplied guides do not state an exact warmup duration or a combined warmup-and-campaign accounting formula. Ask for clarification if either affects your launch capacity.