Why Did AiSDR Contact a Lead I Wanted to Exclude?
Last updated: April 17, 2026
If you noticed that AiSDR reached out to a lead you expected to be suppressed, there are a few common reasons why this might happen. Here's what to check.
1. Email Address Doesn't Exactly Match Your Suppression List
Suppression works by exact matching. If you added a specific email address to your suppression list, AiSDR will only exclude that precise address. This becomes an issue when a company uses multiple domains or subdomains for their employees.
Example: You suppressed john.smith@company.com, but John's work email is actually john.smith@us.company.com or john.smith@mail.company.com. Because those addresses don't match exactly, AiSDR won't recognize the lead as suppressed and may reach out.
2. Domain vs. Email Address Suppression: Know the Difference
The suppression list works differently depending on what you add:
What you add | What gets suppressed |
A domain (e.g., | All leads from that company, regardless of email address or subdomain |
A specific email address (e.g., | Only that exact contact- nobody else from the company |
-Use domain-level suppression when you want to exclude an entire organization.
-Use email-level suppression when you only want to skip specific individuals.
3. Seeing Suppressed Leads in Your Lead List? That's Expected
If you notice that leads from your suppression list still appear in your campaign's lead list, don't worry, this is by design. AiSDR checks every lead against your suppression list before each step in the sequence.
Suppressed leads will simply be skipped at each touchpoint. They won't be removed from your lead list view, but they won't be contacted.
4. Added a Lead to the Suppression List After the Campaign Went Live?
That's fine too. Since AiSDR checks suppression before every sequence step, any lead you add to the suppression list mid-campaign will be caught before their next scheduled touchpoint.
When this happens, AiSDR will automatically update that lead's status to "Closed" to ensure they are not contacted again, neither in the current campaign nor in future outreach.
Note: CRM Suppression Sync Timing
If you are syncing your suppression list from a CRM, keep in mind that domains and email addresses may take some time to synchronize. In rare cases, this delay means AiSDR could contact a lead before the suppression entry has fully propagated. To avoid this, add leads or domains to your suppression list before creating the campaign — this gives the sync enough time to complete before any messages are sent.