How to tighten authorization on smtp relay server?

Question

postfix

Good ...! There is an smtp relay server. Mail runs through it normally, but how to fasten basic authorization?

Answer 1

basic auth is from web realm, you need smtp auth anyway

Answer 2

Did so. Delivered dovecot

/etc/dovecot/dovecot.conf
protocols = imap pop3
mail_location =  maildir:~/Maildir

/etc/dovecot/conf.d/10-auth.conf
auth_mechanisms = plain login

/etc/dovecot/conf.d/10-mail.conf
mail_location = maildir:~/Maildir

/etc/dovecot/conf.d/10-master.conf
 #unix_listener auth-userdb {
     #mode = 0600
     #user =
     #group =
   #}
 unix_listener /var/spool/postfix/private/auth {
     mode = 0666
     user = postfix
     group = postfix
   }

/etc/dovecot/conf.d/20-pop3.conf
pop3_uidl_format = %08Xu%08Xv
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh

added to postfix config

/etc/postfix/main.cf
 smtpd_sasl_auth_enable = yes
 smtpd_sasl_security_options = noanonymous
 smtpd_sasl_local_domain = $myhostname
 smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks, reject_unauth_destination
 broken_sasl_auth_clients = yes
 smtpd_sasl_type = dovecot
 smtpd_sasl_path = private/auth