Displaying Bug BID158

Application: freenats
Status: Resolved

Description:
In sendmail-based environments (such as the VM) where sendmail is unable to determine a correct hostname to present it presents as localhost.localdomain (or sometimes a local-only DNS name) to an external mailserver. If the external mailserver has anti-spam rules on requiring either the HELO ID to exist, match the sender or match the from domain in the email then this causes mail to be rejected.

Solution/Workaround:
This is not a bug in freenats but an environmental/SMTP problem where your mailserver has ultra-strict rules and the system is not able to determine a proper resolvable hostname from DHCP/static config. See the troubleshooting section of the documentation for how to resolve this issue.

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