Do your deliveries reach the right inbox?


In this tutorial, you will learn what Contactsend seed lists are, as well as how they can be created and used.

What is a seed list?

According to a study of ReturnPath, that every year publishes global studies about deliverability, abot the 20% of commercial emails do not reach the inbox. The percentage is high and the perspective changes if your delivery are in that 20%.*

have you ever thought about how to monitor where your emails arrive once you send them? Contactlab did it, and developed different tools with the goal to monitor and improve as muh as possible the deliverability of your campaigns. Seed lista are just an example.

A seed list is a very useful way of controlling and monitoring deliveries. It is made up of a maximum of 30 email addresses, including ones that are not in the database, which receive copies of all real deliveries sent using Contactsend, or those sent to selected email groups.

Seed lists enable you to check whether, for example, a specific delivery is correctly received from different email servers, the message is regarded as spam, or there are any problems with the delivery.

You can use a different seed list for each email group, one for a combination of groups, or one that is active for all deliveries. Read Contactsend Guide to discover more about “Email groups”.  You can configure a maximum of 10 seed lists.


To create a seed list, do the following:

  1. Sign in to Contactsend, and click Configure > Automation > seed list.

  1. Select Add a new seed list and give it a recognizable name.
  2. Click Insert.
    You have now created a basic seed list.

  1. Next, add the email addresses that should automatically receive a delivery copy, by clicking 
  2. To define the deliveries that the seed list should be applied to, do one of the following:
    1. To associate the seed list with one or more email groups, click 
      Associating the seed list with an email group means that you do not have to repeatedly enter certain settings, which are common to different deliveries.
      Remember that an email group is a container that can be used for an infinite number of deliveries. A group should not be confused with an individual delivery.
    2. To apply the seed list to all deliveries, regardless of the group, click 
    3. To active the seed list, click 
    4. To delete the seed list, click 

The seed list addressees receive a copy of the first email in a Contactsend delivery. If there is personalized content, it will be the same material that is used for the first recipient. Links work correctly, but do not generate events and, as a result, they have no impact on statistics. Links managed by Contactsend, such as web version, unsubscribe and similar, do not work.

To know more about Seed Lists consult the “Automation” section in Contactsend Guide.