Eliminate duplicates with mailworx

High-quality subscriber data is the base for a successful email campaign. If you want to obtain this high quality you have to invest some work in it. mailworx helps you with a really simple contact administration and supports you by keeping your data updated.

In the following paper we will show you not only the relevance of a good subscriber data quality, but also how to use the duplicate administration of mailworx.


Your questions - our answers

How to recognize duplicates and how to handle them

Easily manage duplicates with mailworx

Merging contact-duplicates

Maintaining contact-duplicates



If your question hasn´t been answered in this whitepaper, please let us know. We´d gladly catch up on this.


How to recognize duplicates and how to handle them

Nobody wants to get the same message two times and over and over again. To avoid that, mailworx searches for duplicates in your subscriber database, of course it is you who still has to decide, what you want to do with them.

mailworx uses an intelligent duplicate search: If the same combination of first name and surname has been found more than one time, mailworx shows you this contact in a service area (shown in detail below). It´s just the same with multiple email addresses. The search is done every single time, new contacts are added to your database (e.g. import or registrations for your newsletter).


If mailworx discovers duplicates in your subscriber database you have the following options:

You can merge or maintain the duplicates, or you can decide, that those two contacts are no duplicates and exclude them from the mailworx duplicate service.


Easily manage duplicates with mailworx

On the start dashboard in the area "Data quality" you always get an overview of the current duplicates in your database.

The caution sign indicates, that you should take some time for cleaning your duplicates. Just click on the word "Duplicates".

You can now see a list of possible duplicates. Ideally you should edit every duplicate until the list is empty.

For editing a possible duplicate, click on "Edit".

mailworx now shows you two or more contacts, which may could be duplicates.

In the border above you can select between "Keep selected", "Merge selected" and "Cancel".


Merge contact-duplicates

If you want to merge these duplicates, you have to select them by activating the check boxes in the left column. Now you can decide for each subscriber field (salutation, first name, …) which value should be saved.

After clicking the button "Merge selected", mailworx merges the contacts.  The contact will no longer show up in the duplicates, because there is now just one contact left.


Maintain contact-duplicates

If you want to keep the two possible duplicates in your database, select them by activating the check boxes in the left column and press the button "Keep selected".

Those two contacts stay in your subscriber database and are no longer listed in the list of possible duplicates, but in the list of checked duplicates.



If a new duplicate has been detected, mailworx will automatically put it in the list of possible duplicates, to make sure that you can edit it any time you want.

Try to keep your list of possible duplicates updated and go through it from time to time. The correct subscriber data really is important for a successful email marketing.

Newsletter Subscription

Tips, tricks and lots of useful information from mailworx directly in your inbox. Subscribe to our regular mailworx e-news!