i need to configure the smtp_header_checks from postfix to modify outgoing messages not ingoing messages. my rules work but i search the right way for zimbra.
to modify header_checks i used:
zmlocalconfig -e postfix_header_checks="pcre:/opt/zimbra/conf/postfix_header_checks, pcre:/opt/zimbra/conf/postfix_header_checks_ownfile"
zmprov mcf zimbraMtaBlockedExtensionWarnRecipient FALSE
zmmtactl restart |