Contact Management
KlickTipp Blacklist: Prevent Unwanted Email Entries
In this article you will learn how to use the KlickTipp blacklist to prevent unwanted entries in your contact list. You can use it to block individual email addresses as well as entire domains.
Please note that this feature is only available in the Enterprise version.
With the KlickTipp blacklist, you can easily exclude unwanted email addresses. You can even define certain patterns to keep these addresses away from your recipients in advance. Here we show you the various options you can use for this.
Step-by-Step Instructions
- In your KlickTipp account, click on → Contacts → Blacklist.
- Under → Reject Entries from, enter the various email addresses. Combinations of placeholders, so-called wildcards and parts of email addresses, such as the domain part, are also possible. We call these combinations patterns.
You can enter the following patterns to prevent the entry of corresponding email addresses:
Individual Email Addresses
annoying.hater@example.com
constant.annoyance@any-domain.com
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Good to Know
These patterns also work without special wildcards. They take effect as soon as the text appears anywhere in the email address (similar to an asterisk before and after). “annoying.hater@example.com” also takes effect with “no.annoying.hater@example.com ”, for example. If this is undesirable, use the placeholders ^ and $ (see description below).
* - Placeholder for Any Number of Characters
A typical use for this character is a complete blacklisting of emails with an unwanted domain. For example, the following pattern blocks all addresses from wettbewerber.com
*@competitor.com
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If you also want to blacklist foreign domains of the competitor, the pattern is as follows:
*@competitor.*
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The placeholder * can be used not only before and after, but also within the pattern. Use this to include all subdomains of the competitor.
*@*.competitor.*
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? - Placeholder for a Single Character
Even if there are few use cases for this placeholder, it is included: It stands for exactly one character. The following example pattern therefore blacklists nikolaj@example.com, nikolay@example.com, nikolai@example.com, nikolas@example.com, but not nikola@example.com or nikolaus@example.com.
nikola?@example.com
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^ and $ - Start and End of the Email Address
The placeholder ^ at the beginning of a pattern indicates that the following text must be at the beginning of the email address. The following pattern therefore blacklists troublemaker@example.com, troublemaker-abc@web.de, but not abc-troublemaker@web.de.
^troublemaker*
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The opposite of the placeholder ^ is the placeholder $. It indicates that the text before the placeholder must appear at the end of the email address. The following example pattern therefore blacklists e.g. abc@spam_slinger.info, xyz@super-spam_ slinger.info, but not spam_slinger.info@example.com.
*spam_slinger.info$
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