Search found 7 matches

by lvhannan2
Mon May 07, 2018 8:02 am
Forum: Administrators
Topic: zimbra 8.8.7 sender smtp restriction problem
Replies: 3
Views: 621

Re: zimbra 8.8.7 sender smtp restriction problem

it only happen on local network, outside the mynetwork, this did not happen inside mynetwork, does this mean inside mynetwork do not need to authentication?
by lvhannan2
Mon May 07, 2018 7:33 am
Forum: Administrators
Topic: Restricted Sender/Sender Must Login on Zimbra 8.7
Replies: 5
Views: 2886

Re: Restricted Sender/Sender Must Login on Zimbra 8.7

i have the exactly same problem too, when i use zimbra8.6 everthing is fine, but after upgrade to zimbra8.8.7, this prevent fake sender configuration does not work.
by lvhannan2
Mon May 07, 2018 6:50 am
Forum: Administrators
Topic: zimbra 8.8.7 sender smtp restriction problem
Replies: 3
Views: 621

Re: zimbra 8.8.7 sender smtp restriction problem

additional to my post problem, i test that i can fake user send to my domain only, not to other domain, i have already configure the my trust domain.
by lvhannan2
Mon May 07, 2018 5:49 am
Forum: Administrators
Topic: zimbra 8.8.7 sender smtp restriction problem
Replies: 3
Views: 621

zimbra 8.8.7 sender smtp restriction problem

i use zimbra8.6 for two years, it works great, last week i upgrade to zimbra8.8.7,after upgrade ,everything goes fine, but i find there is serious smtp sender problem, i can use cmd command to fake a user inside my company to send email without authentication, i have follow this wiki "https://w...
by lvhannan2
Fri Apr 13, 2018 8:16 am
Forum: Administrators
Topic: serious open relay problem with zimbra
Replies: 4
Views: 1433

Re: serious open relay problem with zimbra

thanks for the help
by lvhannan2
Thu Apr 12, 2018 12:52 am
Forum: Administrators
Topic: serious open relay problem with zimbra
Replies: 4
Views: 1433

Re: serious open relay problem with zimbra

@klug
very appericate your kindly help, can you give me some instruction on deploy spf to prevent this issue,
i have already set spf on dns .The other domain can identify my domain @abc.com from my ip address.
but i have no idea how to use spf policy to identify the others .

thanks a lot.
by lvhannan2
Wed Apr 11, 2018 8:17 am
Forum: Administrators
Topic: serious open relay problem with zimbra
Replies: 4
Views: 1433

serious open relay problem with zimbra

i am now using zimbra 8.6 . i use ldap authenticate user email account .(https://wiki.zimbra.com/wiki/LDAP_Authentication) it works fine. To prevent open relay problem , i also configure mta trust networks to only allow local network.(https://wiki.zimbra.com/wiki/ZimbraMtaMyNetworks) but since last ...

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