Please do NOT respond to these emails!
 

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Dear Customer,
several phishing emails are currently sent out by unknown persons.
Please do NOT respond to these emails! There has been NO change in our system.
These emails are phishing attacks to acquire sensitive data.

The messages can have a subject line such as:
"For the owner of the mailbox yxz@key-systems.net

We do our best to contain the phishing attacks."

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GOOD HOSTING!