Postfix anti-spam settings

  increase the protection against the fake configuration of the sender's personal parts:

code is as follows

&nbs P;

# smtpd related config smtpd_recipient_restrictions = &nbs P Permit_mynetworks,   permit_sasl_authenticated, #  reject_non_fqdn_hostname,   Reject_non _fqdn_sender,   reject_non_fqdn_recipient,   reject_unauth_destination,   reject_unauth_ pipelining,   reject_invalid_hostname   Smtpd_sender_restrictions =   Permit_ Mynetworks,   check_recipient_access hash:/etc/postfix/local_recipient,   Permit_sasl_ Authenticated,   Reject_sender_login_mismatch,   Reject_authenticated_sender_login_mismatch,   Reject_unauthenticated_sender_login_mismatch,   reject_unknown_sender_domain # SMTP AUTH Config here broken_sasl_auth_clients = yes Smtpd_sasl_auth_enable = yes Smtpd_sasl_security_options = noanonymous

Add:

Configuration Extmail does not allow the forgery of non-existent local mail addresses, and does not allow and counterfeit other people's e-mail addresses to send mail

cd/etc/postfix/

Cat >mysql_virtual_sender_maps.cf<

user = Extmail

Password = Extmail

hosts = localhost

dbname = Extmail

Table = Mailbox

Select_field = Username

Where_field = Username

Additional_conditions = and active = ' 1 '

Eof

Vim MAIN.CF

Smtpd_sender_login_maps =

Mysql:/etc/postfix/mysql_virtual_sender_maps.cf

Smtpd_sender_restrictions =

Permit_mynetworks,

Reject_sender_login_mismatch,

Reject_authenticated_sender_login_mismatch,

Reject_unauthenticated_sender_login_mismatch the configuration to take effect

Postfix Reload