This is my first post, and honestly i am not an administrator.
sombody pls help me, i just resolved an issue there was many fake account can send with my domain name.
I found the solution here: https://wiki.zimbra.com/wiki/Rejecting_ ... _addresses
Code: Select all
zmlocalconfig -e postfix_smtpd_sender_restrictions="reject_unknown_sender_domain, permit_mynetworks, permit_sasl_authenticated, check_sender_access hash:/opt/zimbra/conf/domainrestrict, permit"
But now some user outside of my office cannot send email, all item rejected. it was via ISP's SMTP with port 587 no security.
Thank you