smtp authentication

[Korcillo]

Hi, i can´t find how to authenticate users on port 25, several people have this issue with zimbra but i can´t find a solution, when i connect through telnet to my server, i can send mail without authentication and make pishing too. How can i solved this problem. Please help me. Imagine a user send an email pretending to be the manager and say that the day is free.

[Korcillo]

Nobody??? I need help please!!!!

[phoenix]

Originally Posted by Korcillo

Nobody??? I need help please!!!!

It might help if you'd posted this in the correct forum instead of the Zimbra Desktop forum.

Did you search the forums for an answer to this question (it has been answered before)? Your users should be using port 587 as the Submission port, that requires authentication.

[Korcillo]

i solved the problem closing 25 with iptables and configuring 587 port in outlook but the phishing is there yet, i can put the mail address that i want.

[phoenix]

Originally Posted by Korcillo

i solved the problem closing 25 with iptables and configuring 587 port in outlook but the phishing is there yet, i can put the mail address that i want.

That's not phishing, it's called sending an email.

[Korcillo]

Please, am not stupid. I refer to the mail from, for example, my address is: address@mail.com when I send a email throught outlook, in the mail from I can write the address I want, whatever@yahoo.whatever, I found this on the internet, but it doesn't work for me, this appears to be the solution to my problem.

main.cf

smtpd_restriction_classes = misremitentes
misremitentes = check_sender_access hash:/etc/postfix/misremitentes, reject
smtpd_sender_restrictions = check_client_access hash:/etc/postfix/misclientes

/etc/postfix/misremitentes

mydomain.com OK

/etc/postfix/misclientes

mydomain.com misremitentes

The thing is how to adapt this to zimbra zmmta.cf
I'm using zimbra 6.10
Thanks.

[phoenix]

Originally Posted by Korcillo

Please, am not stupid.

Nobody said, or implied, that you were.

Originally Posted by Korcillo

I refer to the mail from, for example, my address is: address@mail.com when I send a email throught outlook, in the mail from I can write the address I want, whatever@yahoo.whatever, I found this on the internet, but it doesn't work for me, this appears to be the solution to my problem.

Anyone that's on the Trusted Networks will be able to send an email through your server and it can contain any from address. You can either restrict them from connecting via the konsole or modify the Trusted Networks. The users should be connecting via port 587 and have to authenticate to get the ability to send email.

[Korcillo]

That is the thing, I need to restrict them to send only from their address. How can i do that??

[Korcillo]

i followed this guide RestrictPostfixSenders - Zimbra :: Wiki, hoping that works but nothing, realy i don't understand, am losing my fe on zimbra.