Home » Kerio User Forums » Kerio Connect » Spoofed identify on authenticated user having alias or multiple emails

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We have set anti spoofing feature on Kerio and we have issue with account having multiple emails addresses or Aliases.

This is the case four our "IT-Supervisor" account. This account had multiple emails and multiple aliases. Authentication is done with the "IT-Supervisor" account. "From" field is set with an aliases or a secodaries emails (aliases or secondary email belonging to the "IT-Supervisor" account)

Server is now rejecting these emails :

SMTP: Message from authenticated user: <IT-Supervisor@domain.com> was rejected, because sender identity was detected as spoofed. (Source IP address:, From header: <Firewall<_at_>domain.com>, Sender header: <>)

I don't want to burn a user licence by creating new accounts. How can I solve this issue ?

Kerio Connect is v8.3.4 Patch 1 (build 3377)

[Updated on: Wed, 12 November 2014 11:41]


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Kerio Tech Support may be the best option. The more info you can provide, the better. Their typical advice is below.

Depending on which direction these mails are spoofed in, you can enable some debug logging:

- Within the Kerio WebAdmin, go to Logs -> Debug
- Right-click in the right window
- Left-click on 'Messages'
- Enable SMTP Server (for inbound) or SMTP Client (for outbound)
- Click OK
- Right-click again and click on 'Clear Log'

Wait for the issue to occur again, make a note of the sender address, recipient address and the time please. Once you have completed the requested tasks, they'll want you to send them the debug.log in plain text/zipped and they can hopefully look into the issue further.

Ken Snyder
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