🔍 Overview
If your email campaign sent to more contacts than you expected — or produced an unexpectedly high number of bounces — there are several common configuration areas to investigate. This article outlines the known categories of risk so you can review your setup and reduce the likelihood of over-sending before your next campaign.
⚠️ Common Cause 1: Exclusion Lists Not Carried Over When Cloning
When you clone an existing campaign, suppression or exclusion lists attached to the original may not transfer automatically to the cloned version. Contacts you previously suppressed — such as unsubscribes, bounced addresses, or opted-out users — could be included again.
What to check:
- After cloning a campaign, review the audience configuration of the new campaign and confirm that any suppression or exclusion lists from the original have been re-applied manually.
- Make this check a standard part of your cloning workflow, before editing content or scheduling the send.
👥 Common Cause 2: Duplicate Contacts Across Audience Sources
If the same email address exists in multiple lists or segments that are all included in one campaign, that contact may receive more than one message. This inflates your send count and can harm your sender reputation.
What to check:
- Review all lists and segments selected as your audience and look for overlapping contacts.
- Consult your campaign's audience settings to see whether your platform offers any deduplication option, and confirm it is enabled if available.
- Consolidate overlapping lists before launch and maintain a single master suppression list rather than several partial ones.
🔄 Common Cause 3: Dynamic Segments Add Contacts After You Review
Dynamic segments continuously update their membership based on rules — for example, "all contacts who visited a page in the last 30 days." If your campaign targets a dynamic segment, new qualifying contacts can be added automatically between the time you review the audience and the time the campaign actually sends. This is expected behavior, but it can cause a higher-than-anticipated send count.
What to check:
- Identify whether any segment in your audience is dynamic (rule-based and continuously updated).
- If you need a fixed send count, consider converting the relevant segment to a static list at the point of review, so membership is locked before the campaign sends.
- If you keep a dynamic segment, be aware that the final recipient count may differ from the count shown during review.
📋 Common Cause 4: Audience Configuration Reviewed at the Wrong Time
Reviewing your estimated audience count well in advance of the scheduled send time can lead to a mismatch, particularly if your contact database is actively changing. New contacts imported, contacts re-added after being removed, or list membership changes can all affect the final send count.
What to check:
- Review your audience configuration as close to the send time as practical.
- Confirm that your suppression and exclusion sources reflect your most current opt-out and bounce data before finalizing the send.
📞 Need Help Investigating a Specific Campaign?
If you have already reviewed the areas above and are still seeing unexpected send counts or bounce rates, escalate to the support team with the following information ready:
- The name of the affected campaign
- The approximate send date and time
- The expected recipient count versus the actual sent count
- Whether the campaign was cloned from another campaign
- Whether any dynamic segments were used in the audience
- Any error messages or bounce reports you have received
If you need further assistance, open the chat widget in the bottom-right corner of the platform and type human teammate to be connected with a member of our team.