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Sign disclaimer on outgoing mails

With iRedMail, it's able to sign disclaimer on outgoing email with Amavisd-new and alterMIME, it is pre-configured but disabled by default.

To enable the signing, please find setting in Amavisd config file amavisd.conf:

#$defang_maps_by_ccat{+CC_CATCHALL} = [ 'disclaimer' ];

Uncomment the $defang_maps_by_ccat line and restart Amavisd service will enable signing disclaimer on outgoing email, default disclaimer text is stored in /etc/postfix/disclaimer/default.txt (Linux/OpenBSD) or /usr/local/etc/postfix/disclaimer/default.txt.

If you need a per-domain disclaimer, please update setting @disclaimer_options_bysender_maps in Amavisd config file:

@disclaimer_options_bysender_maps = ({
    # Per-domain disclaimer setting: /etc/postfix/disclaimer/host1.iredmail.org.txt
    #'host1.iredmail.org' => 'host1.iredmail.org',

    # Per-user disclaimer setting: /etc/postfix/disclaimer/boss.iredmail.org.txt
    #'boss@iredmail.org'  => 'boss.iredmail.org',

    # Catch-all disclaimer setting: /etc/postfix/disclaimer/default.txt
    '.' => 'default',
},);

Just add your domain name with the same syntax, then create required file with disclaimer text. For example, for domain example.com:

@disclaimer_options_bysender_maps = ({
    # domain 'example.com'
    # disclaimer text file: /etc/postfix/disclaimer/example.com.txt
    'example.com' => 'example.com',

    # Catch-all disclaimer setting: /etc/postfix/disclaimer/default.txt
    '.' => 'default',
},);

Restarting Amavisd service is required each time you changed its config file.

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