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Force smtp authentication for sending mail to own zimbra domain

Posted: Sat Jan 30, 2016 4:26 am
by Bruce999
Hello,
i searched for two days (and two nights ;-)) but i could not solve this problem.
I configured mydomain.com
My smtp is not an open relay and it asks for authentication to send mail outside.
If you try to telnet the server and try to use a non existent address @mydomain.com to send to my domain you cannot
but if you know an existent address inside mydomain.com you are able to send mail inside mydomain.com with no authentication.
I would like to solve this and ask for authentication in this case too.
Any help appreciated!
Thanks

Force smtp authentication for sending mail to own zimbra domain

Posted: Wed Feb 24, 2016 5:47 am
by indikadias9
did you found any response ? I have the same question

Force smtp authentication for sending mail to own zimbra domain

Posted: Wed Feb 24, 2016 5:55 am
by Bruce999
Hello, no none gave me an answer.

Force smtp authentication for sending mail to own zimbra domain

Posted: Wed Feb 24, 2016 5:58 am
by indikadias9
I tried this ..but it doesn't work for telnet



https://wiki.zimbra.com/wiki/SMTP_Auth_Problems

Re: Force smtp authentication for sending mail to own zimbra domain

Posted: Sun Sep 16, 2018 12:11 am
by ldelana77

Re: Force smtp authentication for sending mail to own zimbra domain

Posted: Fri Feb 21, 2020 10:39 am
by gmahima1029
hey i am using ZCS 8.6
i implemented this enforce from and sasl username, Its working partially. Problem is when i telnet my mail server from outside with my public ip existing user can send mail to existing user with out authentication. It should give an error like sender not logined, But help me why my server is not asking for authetication, after i followed this link.