Hikvision snapshot size 6MP camera

Hello,
have a 6MP camera 2CD2463G0-IW
the camera is set to 6MP 3072-2048.
The snapshots attached to the email are however 1200x900
i can not find any setting to change this.
Is this default for attached snapshots?
will the triggerd by event setting perhaps overrule this resolution.?
i can probably make snapshots locally and send those but i like to do it without internal storage
here are my settings
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