It is possible that the segment you’ve  created in Teamleader isn’t exactly the same as the segment in Campaign Monitor. The reason for this is that Campaign Monitor uses different criteria that may cause some differences:

More contacts in Teamleader than in Campaign Monitor

  • Only contacts with an email address will be exported. Contacts in your Teamleader segment without an email address will not appear in Campaign Monitor.
  • The email address is a unique key. If an email address appears multiple times in Teamleader, Campaign Monitor will only use this once.
  • Recipients can always unsubscribe from your campaigns. They will be excluded from the CM segment, but will remain in your Teamleader segment.
  • The same goes for bounced email addresses. When a recipient cannot be reached (this can happen for multiple reasons), the address will also be excluded from CM, but not in Teamleader.

More contacts in Campaign Monitor than in Teamleader

The number of email addresses can also be higher in Campaign Monitor than the contacts listed in your Teamleader segment. This can happen when you have a custom field to enter a second email address in Teamleader. Campaign Monitor will recognize each of these email addresses as a unique key.