How to add X-Envelope-To header

How to add X-Envelope-To header

   KB 23091        Last updated on 2016-11-1  

(0 votes)


1. Create a file:

vim /opt/zimbra/postfix/conf/

append the line:

/(.+)/          PREPEND X-Envelope-To: $1

2. Add the following line in /opt/zimbra/conf/zmconfigd/

check_recipient_access pcre:/opt/zimbra/postfix/conf/

It should look like:

%%contains VAR:zimbraMtaRestriction check_client_access lmdb:/opt/zimbra/conf/postfix_blacklist%%
%%contains VAR:zimbraServiceEnabled cbpolicyd^ check_policy_service inet:localhost:%%zimbraCBPolicydBindPort%%%%
check_recipient_access pcre:/opt/zimbra/postfix/conf/

3. Finally restart:

 zmmtactl restart;zmmailboxdctl restart;zmconfigdctl restart

Additional Content

Beware, that this solution breaks the privacy of Bcc recipients.

There is also a bug opened for that here.

Verified Against: Zimbra Collaboration 8.6, 8.5, 8.0 Date Created: 01/11/2016
Article ID: Date Modified: 2016-11-01

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Wiki/KB reviewed by SME1 SME2 COPY EDITOR Last edit by Teodor Vizirov
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