The 
SMTP Sensor checks if an SMTP service is available and works properly
Side Panel
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Sensor Tasks
 Test Sensor
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Tests the current sensor settings
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 Get Help
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Opens the ServerSentinel online help
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Basic Settings
Display Name
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Defines the name of the sensor
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Active
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Toggles the sensor ON/OFF
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Check Interval
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Interval between two sensor polls
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Only check if this sensor didn't fail
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This sensor will only be checked, if the sensor in the drop down list didn't fail
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Further Information
Comment
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May contain a free comment
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SMTP Options
Remote Host
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IP address of the remote host
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Port
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Port of the SMTP server
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Authentication
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Defines if server demands authentication
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Username
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Enter the username, if needed
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Password
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Enter the password, if needed
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Encryption
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Defines the encryption to use (None / SSL / TLS).
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Registered DNS hostname (optional)
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Contains the DNS hostname
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Main Panel
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Setting
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uses value
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Server's initial greeting text
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String
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ESMTP supported
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Boolean
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ESMTP features
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CSV String
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Session ID
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String
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Max. allowed Msg.-Size
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Decimal
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SASL authentication methods
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CSV String
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Check time
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Date
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Response time (ms)
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Integer
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Status flag
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Enum
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