MailEnable Enterprise Guide
Services and Connectors / SMTP Connector / SMTP - Outbound
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    SMTP - Outbound
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    Maximum number of send threads

    The number of threads that are used to send email.

    Timeout for Remote Mail Servers

    How long the SMTP service will wait for a response from a remote mail server before disconnecting.

    Outgoing queue poll interval

    How often the SMTP service polls the outgoing queue directory for mail messages to send. This is measured in seconds.

    Limit outbound message size

    Forces MailEnable to check the size of each message before delivering to a remote mail server. If the message cannot be delivered it will be returned to the sender (or sent to the bad mail directory if the message is system generated).

    Outbound IP Binding

    Forces the SMTP to use a specific IP address on the server when it is trying to deliver email.

    Outbound TLS Will try and establish a connection with the remote server using TLS if the remote server supports TLS, otherwise will fall back to a Non-TLS send. This does not require you to configure an SSL certificate locally.
    Outbound Abuse Monitoring This option logs to the SMTP Debug log an indication when a user has sent too many failed emails in an hour.