I thought we had mutual understandings. If you have anything to help the user about any issue that the user posted, you are welcome. But you keep posting sweeping generalizing comments. 

I still believe your knowledge would help any user in any situation. 

Nothing is perfect, we need to put effort to make it perfect!

All the best!

@Sharif

I don't care you downgraded me again. It just shows it is not worth any ones time here. Too many problems constantly reported. Answers hardly any or days, weeks of waiting time. I jumped ship and use Maldua Zimbra, also FOSS and it just works and no fussing around to get things going.

You should also use some internet tools to check DNS, MX and other settings. Just search google, there are plenty tools to test your server.

Like Mail Tester, MXToolbox and many more to be found.

Since you have a working Zimbra 8.8, why not try out Maldua Zimbra, it is Foss and version 10.1 is available. It works. 

I understand your concern. IMO, these policies are not the issue here. All the out of the box (default) policies of Carbonio CE does not conflict with receiving external emails via generic flow like:

Sender ---> Sending Server ---> DNS Resolution ---> Recipient Server ---> Recipient

I think there were some custom configuration in the Zimbra server to allow your specific flow.

You need to diagnosis what is causing this block otherwise our steps would not be effective.

Would it be possible to remove all restrictions on receiving emails for a test? (and how) ,If the block persists, the problem will not be solved by my server.

Thanks

no succes ...

modify /opt/zextras/conf/postfix_client_access like this : 

54.186.22.84 OK
54.191.214.3 OK
54.149.36.10 OK
inbound5c.ore.mailhop.org OK
inbound5e.ore.mailhop.org OK
inbound5f.ore.mailhop.org OK

reconfigure with carbonio prov ms ...

postconf smtpd_client_restrictions = check_client_access lmdb:/opt/zextras/conf/postfix_client_access, reject_unauth_pipelining

but server say allways : Client host rejected: Access denied (in reply to RCPT command) (from gmail)

....

Could you please try followings:

• Create the access file with the contents

cat /opt/zextras/conf/postfix_client_access

• Create the DB file

postmap postfix_client_access

• Configure the client restriction as:

su - zextras
carbonio prov ms $(zmhostname) zimbraMtaSmtpdClientRestrictions "check_client_access lmdb:/opt/zextras/conf/postfix_client_access, reject_unauth_pipelining"

•  Restart service and check if the changes persist:

su - zextras -c "postconf smtpd_client_restrictions"

Note: Please make sure to keep backup of configuration files before executing changes that could affect the system or operation.

Hi Sharif,

postconf result:

postconf smtpd_client_restrictions
smtpd_client_restrictions = reject_unauth_pipelining

postconf smtpd_recipient_restrictions
smtpd_recipient_restrictions = reject_non_fqdn_recipient, permit_sasl_authenticated, permit_mynetworks, reject_unlisted_recipient, reject_invalid_helo_hostname, reject_non_fqdn_sender, reject_unknown_sender_domain, permit

postconf smtpd_sender_restrictions
smtpd_sender_restrictions = check_sender_access regexp:/opt/zextras/common/conf/tag_as_originating.re, permit_mynetworks, reject_sender_login_mismatch, permit_sasl_authenticated, permit_tls_clientcerts, check_sender_access regexp:/opt/zextras/common/conf/tag_as_foreign.re

create /opt/zextras/conf/postfix_client_access, postmap make postfix_client_access.lmdb

but postconf smtpd_client_restrictions say always : smtpd_client_restrictions = reject_unauth_pipelining

maybe i will reboot ?

thanks.