How to block smtp of a single user in WHM

How to block smtp of a single user in WHM

Use the following steps, login server with root user.

#ssh root@IP_Server00000000000

run below commands on terminal:

#cat /etc/blockeddomains
#echo "block_domain.com" >> /etc/blockeddomains

Login WHM Panel and follow below procedure

Exim Advanced Editor > Section: CONFIG scroll down to “Add additional configuration setting”.
domainlist blocked_domains = lsearch;/etc/blockeddomains
Then scroll down to the Section: ROUTERSTART which is below the democheck entry and add:
reject_domains:

driver = redirect

# RBL Blacklist incoming hosts

domains = blocked_domains

allow_fail

data = :fail: Connection rejected: SPAM source $domain is manually blacklisted.

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