Add Custom Local Parameters for Zimbra Postfix Configuration

Add_Custom_Local_Parameters_for_Zimbra_Postfix_Configuration.md

Add Custom Local Parameters for Zimbra Postfix Configuration

We will add two custom local parameters:

• sender_bcc_maps
• recipient_bcc_maps

so that we could define our own per-user Bcc: forwarding for all users in a domain (also see this Gist to know more generally about how to configure it for Postfix).

sudo -iuzimbra vi conf/zmconfigd.cf

Open the file /opt/zimbra/conf/zmconfigd.cf in your favourite $EDITOR and find line stating RESTART mta in it (it should be located in a section SECTION mta DEPENDS ... or similar). Then add the following two lines just before that line so that it will look like this.

    POSTCONF sender_bcc_maps    LOCAL custom_postfix_sender_bcc_maps
    POSTCONF recipient_bcc_maps LOCAL custom_postfix_recipient_bcc_maps
    RESTART mta

The two lines states that sender_bcc_maps and recipient_bcc_maps in Postfix configuration that will be generated by Zimbra will possess values configured via zmlocalconfig -e (the LOCAL keyword makes this) called custom_postfix_sender_bcc_maps and custom_postfix_recipient_bcc_maps respectively.

Once having this done you can set the values using the zmlocalconfig -e as follows (under the zimbra user):

sudo -iuzimbra zmlocalconfig -e 'custom_postfix_sender_bcc_maps=pcre:/opt/zimbra/conf/postfix_domain_users_bcc_maps'
sudo -iuzimbra zmlocalconfig -e 'custom_postfix_recipient_bcc_maps=pcre:/opt/zimbra/conf/postfix_domain_users_bcc_maps'

(There MUST NOT be any whitespace around the = / equal sign!)

Note: Because in this very case we want both Bcc: rulesets to be exactly the same we use the same file for both the maps. You can, of course, set different maps files for each. :-)

Now you can restart the Zimbra's MTA service which will yield Postfix configuration regeneration as well:

sudo -iuzimbra zmmtactl restart

Review if everything is set as expected:

sudo -iuzimbra zmlocalconfig |grep -E 'custom_postfix_'
sudo -iuzimbra postconf |grep -E '(sender|recipient)_bcc_maps'

Note: I guess you will have to do the editing after each Zimbra update so this method is very, very unreliable and error-prone!