SMTP authentication for zimbra postfix
Hope things are going great here .. :-)
I'm a zimbra zcs-4.0.4_GA_457.FC4 admin.
Let me jump into my probelm now - it is SPAM :(
I have applied many settings to zimbra postfix reading the froum here..and could block a huge chunk of spams.. thanks guys..
Now the set up is like this - we have internal mail groups and only mydomain.com users are allowed to mail to those groups. All other domains are bloked using -
permitted_senders_list = check_sender_access hash:/opt/zimbra/postfix/conf/permitted_senders, reject
smtpd_restriction_classes = permitted_senders_list.
Ok, things were fine, now the spamer generates some junk ids (not real) in mydomian.com (eg: firstname.lastname@example.org) and sends mails. Please help me block him now, need to enable SMTP authentication? My requirement is like this - only a valid user with a valid password should be able to send mails from mydomain.com. Possible right? I was searching here in forums but too many lists & unable to find. I know with postfix it's possible (but don't know how/didn't try yet) but confused with LDAP authetication in zimbra.
Please give me some hints. Is this issue already addressed? then somebody can direct me to the proper place? :-)