How to block "on behalf of" emails in IMAP/POP outlook profile

[jaismathew]

Hello,
I am using Zimbra 8.0.6 Network edition with 2000 users. I noticed that all POP/IMAP users can send mails with "on behalf of" inside and outside the domain and i need to block it. I did not enable "allow sending email in any address" for cos/users.
Zimbra connector users are getting error while they are trying with 'on behalf of' as expected. Please help me resolve this problem.

[jaismathew]

Please help me to resolve this issue. I need to disable this feature "on behalf of" for my pop/imap users from server side.

[DualBoot]

Hello,

I think what you search is here : https://wiki.zimbra.com/wiki/Enforcing_ ... ername_8.5

Regards,

[jaismathew]

Hello Duaboot,
Thanks for the update. My zimbra version is 8.0.6 and as per the this link it will only work with 8.6 on wards..

[DualBoot]

Maybe you could try to adapt it to your version. Or upgrade your Zimbra. And I think this last option is better for security purpose.

[jaismathew]

Hello,
I prepared a 8.7 test server and did the same based on the below links. It's working perfectly using telnet but through outlook we can put any address in the from field.
https://wiki.zimbra.com/wiki/Rejecting_ ... _addresses
https://wiki.zimbra.com/wiki/Enforcing_ ... ername_8.5

[jaismathew]

I think there is no workable solution in zimbra to block from address customization in POP/IMAP profile.

[swain]

I think you need to upgrade to latest version, it might help.

[bnpps]

Hi,

Same problem here.
"Allow from any address" / allow from address (admin panel) - doesn't work. Executing mentioned obove instructions resolved issue for thunderbird users. For outlook users, outlook connector in network edition resolving issue however if classic imap connection is set problem still persists.