Start/notes.ini Parameters/RouterDisableMailToDomains

RouterDisableMailToDomains

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Parameter: RouterDisableMailToDomains
Short description: Blocks routing to the specified recipient domains – e.g. for block-listing problematic or undesired destinations.

Profile

Parameter
RouterDisableMailToDomains
Category
Mail / Router
Component
Server
Available since
9.0
Supported versions
9.0.1, 10.0, 11.0, 12.0, 14.0, 14.5, 14.5.1
GUI equivalent
Configuration document
Possible values
Comma-separated domain list, e.g. example.com,beispiel.de

Description

Sometimes the router should deliberately not deliver to a domain – for example, a known-compromised third party, an accidentally active mail loop, or an internally blocked recipient domain. RouterDisableMailToDomains holds a comma-separated list of such domains. Mails to these recipients are not delivered by the router and – depending on the rest of the configuration – end up as a Non-Delivery Report (NDR) to the sender.

Example configuration

RouterDisableMailToDomains=spammer.example,competitor.test

Notes & pitfalls

  • Acts complementarily to the Configuration document; in case of conflicts, notes.ini wins.
  • Takes effect after a router restart.
  • For more granular blocks (sender, content), use anti-spam / SMTP inbound rules.
  • Review the block list regularly, otherwise “unexplained” NDRs may appear after the block reason has lapsed.