King0770-Notes-Rejecting-Nested-From-Addresses

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This is a how-to reject nested from addresses.

Example

From:<rick@zimbra.comjohn@zimbra.com>

OR

From:<"rick@zimbra.com john"@zimbra.com>"

From:"<"rick@zimbra.com.johm"@zimbra.com>"

Add the following to the bottom of the /opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf file

check_sender_access pcre:/opt/zimbra/conf/sender_pcre

Next, create the /opt/zimbra/conf/sender_pcre file with the following.

/@.*@/       reject

Restart MTA 

zmmtactl restart
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