zimbra 8.8.7 sender smtp restriction problem

[lvhannan2]

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://wiki.zimbra.com/wiki/Enforcing_ ... ername_8.5". successfuly solve the smtp sender problem in zimbra8.6,
but after this upgrade, in zimbra8.8.7, this configuration does not work anymore, can anyone give me kind help with this issue, thank you.

[lvhannan2]

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.

[lvhannan2]

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?

[chrabarca]

I have the same problem i apply the workarround https://wiki.zimbra.com/wiki/Enforcing_ ... ername_8.5
but after upgrade to 8.8.7 this not work anymore can you help us please?

from outlook pop3 and smtp and thunderbird not work anymore and my client have perms to send as to everyone souplantation