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Thread: Prevent delivery from internal adresses anywhere except to internal addresses

  1. #1
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    Default Prevent delivery from internal adresses anywhere except to internal addresses

    Dear sirs!

    I have zimbra 8 FOSS installation and internal domain mail.local. External mail is received with external accounts in user
    preferences. Each user has another persona with external email (e.g. @mail1.com) -
    each user has two addresses, i.e user1@mail.local and user1@mail1.com.
    @mail.local is for confidential internal mails.
    Is it way to prevent outgoing mail from addresses @mail.local to any address except @mail.local, but permit @mail1.com to any addresses ?

    user1@mail.local -> president@gmail.com --- may cause an error or delivery failure message
    user1@mail1.com -> president@gmail.com --- everything OK
    user1@mail.local -> user2@mail.local --- everything OK

    ???

  2. #2
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    Default

    I solve this using another postfix instance as external MTA with header_checks on "From" field.

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