How to limit the number of recipients in Postfix?

[lijeshk]

• If you wish to limit the total number of recipients in an email, you can do that using the variable:

             smtpd_recipient_limit=10

Code: [Select]

# postconf -e 'smtpd_recipient_limit=10'
# /etc/init.d/postfix restart

• If you wish to specifically limit the number if recipients in TO and CC. You can do that with the option in main.cf:

Code: [Select]

header_checks = regexp:/etc/postfix/header_checks

• Contents of /etc/postfix/header_checks:

Code: [Select]

/^To:([^@]*@){50,}/ REJECT Sorry, your message has too many recipients.
/^Cc:([^@]*@){50,}/ REJECT Sorry, your message has too many recepients.
This will not work for BCC. By the time the message gets to header_checks, the BCC header will be already removed.

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