I installed Zimbra succesfull and using in a production enviroment (Release 7.1.3_GA_3346.RHEL6_64_20110928134428 RHEL6_64 FOSS edition, Patch 7.1.3_P1.)
I activated the SASL login authentication and I realized that I can set up in any EMAIL client the email address that I want, event I can change the domain to google if I wish.
I just have to set up correctly the username and password.
So the recipient receive a mail where the from field is incorrect. So, any user of my company can send to other one changing the from FIELD and making a mess to the recipients.
My domain : domain.es
My user: username
My passwd: password
but i configure in OUTLOOK email@example.com or firstname.lastname@example.org using the credencials "username" and "password".
I did many changes and nothing work.
I post the smtp restriction for your information:
> postconf smtpd_recipient_restrictions
smtpd_recipient_restrictions = reject_non_fqdn_recipient, permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_unlisted_recipient, reject_non_fqdn_sender, reject_unknown_sender_domain, reject_rbl_client cbl.abuseat.org reject_rbl_client psbl.surriel.com reject_rbl_client dnsbl.njabl.org, permit
In zimbra.log I got the following:
zimbra amavis: (14038-01) Open relay? Nonlocal recips but not originating: email@example.com
Note: the firstname.lastname@example.org is any recipient address I send to.
I got the above when the users are not in my trusted networks, but thats why I use authentification.
Thanks a lot in advance