Indicate the primary domain for the server.

If set, forces the domain name XMail uses inside the ESMTP banner used to support CRAM-MD5 ESMTP authentication.

Set the default domain for POP3 client connections.

Set the postmaster address.

The email address that receives notification messages for every message that has had delivery errors. If it is empty (allowed), the notification message is sent to the sender only.

[TempErrorsAdmin]

The email address that receives notification for temporary delivery failures. In case it's empty the notification message is sent to the sender only.

[DefaultSMTPGateways]

A comma separated list of SMTP servers XMail 'must' use to send its mails. This has the precedence over MX records.

[HeloDomain]

If this variable is specified and is not empty, its content is sent as HELO domain. Otherwise the reverse lookup of the local IP is sent as HELO domain. This helps to deal with remote SMTP servers that are set to check the reverse lookup of the incoming IP.

[CheckMailerDomain]

Enable validation of the sender domain ('MAIL FROM:<...@xxx>') by looking up DNS/MX entries.

[RemoveSpoolErrors]

Indicate if mail has to be removed or stored in 'froz' directory after a failure in delivery or filtering.

[NotifyMsgLinesExtra]

Number of lines of the bounced message that have to be listed inside the notify message (lines after the headers section). Default is zero.

[NotifySendLogToSender]

Enable/Disable sending the message log file inside the notify message to the sender. Default is off (zero).

[NotifyTryPattern]

List of delivery attempts that require the system to send a notification to the sender (and eventually to 'TempErrorsAdmin'). The list is a comma separated list of numbers (with no extra spaces) as in:

 "1,4,9"

Default is empty which means no notification is sent upon a delivery attempt failure.

[AllowNullSender]

Enable null sender ('MAIL FROM:<>') messages to be accepted by XMail.

[MaxMTAOps]

Set the maximum number of MTA relay steps before to declare the message as looped (default 16).

[ReceivedHdrType]

Set the verbosity of the Received: message headers tag.

'0': Standard (client IP shown , server IP not). Default.
'1': see: http://www.xmailserver.org/Readme.html#server.tab_variables