Configure relayhost for sending to Microsoft domains

Discussion in 'Installation/Configuration' started by agenturadler, Jun 15, 2026 at 5:04 PM.

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  1. agenturadler

    agenturadler New Member

    Hi all,
    I want to configure a relayhost for sending mails to Microsoft. Unfortunately, Microsoft set a rate limit to our server and is not willing to respond to any message from us or our ISP since more than 3 months.

    I’ve found some tutorials to set up such relayhosts manually with `transport_maps`. But I just want to check, if this is possible via the UI as well.

    As far as I understood, the relayhost configuration entry under Settings is a general configuration for all mails. Otherwise, I haven’t found any possibility to configure a relayhost based on the recipient domain.

    Thank you for your help.
    Kind regards, Christian
     
    agenturadler, Jun 15, 2026 at 5:04 PM
    #1
  2. till

    till Super Moderator Staff Member ISPConfig Developer

    ISPConfig has a general relay setting and a setting per sender domain. There is no relay for a specific recipient; you will have to configure that manually in Postfix.
     
    till, Jun 15, 2026 at 5:13 PM
    #2

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