Mail System Error - Returned Mail

This Message was undeliverable due to the following reason:

Each of the following recipients was rejected by a remote mail server.
The reasons given by the server are included to help you determine why
each recipient was rejected.

Recipient: <socht@barak-online.net>
Reason:    Invalid recipient: <socht@barak-online.net>

Recipient: <socia@barak-online.net>
Reason:    Invalid recipient: <socia@barak-online.net>

Recipient: <societe@barak-online.net>
Reason:    Invalid recipient: <societe@barak-online.net>

Recipient: <socii@barak-online.net>
Reason:    Invalid recipient: <socii@barak-online.net>

Recipient: <socio@barak-online.net>
Reason:    Invalid recipient: <socio@barak-online.net>

Recipient: <socius@barak-online.net>
Reason:    Invalid recipient: <socius@barak-online.net>

Recipient: <socjfxopaoqwvnt@barak-online.net>
Reason:    Invalid recipient: <socjfxopaoqwvnt@barak-online.net>

Recipient: <socker@barak-online.net>
Reason:    Invalid recipient: <socker@barak-online.net>

Recipient: <sockwell@barak-online.net>
Reason:    Invalid recipient: <sockwell@barak-online.net>

Recipient: <socky@barak-online.net>
Reason:    Invalid recipient: <socky@barak-online.net>

Recipient: <socle@barak-online.net>
Reason:    Invalid recipient: <socle@barak-online.net>

Recipient: <socola@barak-online.net>
Reason:    Invalid recipient: <socola@barak-online.net>

Recipient: <socotri@barak-online.net>
Reason:    Invalid recipient: <socotri@barak-online.net>

Recipient: <sodachanh@barak-online.net>
Reason:    Invalid recipient: <sodachanh@barak-online.net>

Recipient: <sodaic@barak-online.net>
Reason:    Invalid recipient: <sodaic@barak-online.net>

Recipient: <sodawasser@barak-online.net>
Reason:    Invalid recipient: <sodawasser@barak-online.net>

Recipient: <soddite@barak-online.net>
Reason:    Invalid recipient: <soddite@barak-online.net>

Recipient: <soder@barak-online.net>
Reason:    Invalid recipient: <soder@barak-online.net>

Recipient: <sodergren@barak-online.net>
Reason:    Invalid recipient: <sodergren@barak-online.net>

Recipient: <soderman@barak-online.net>
Reason:    Invalid recipient: <soderman@barak-online.net>

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