How to enable SMTP Auth

[a2940uw]

Dear all,

English isn’t my first language, so please excuse any mistakes, my setup environment is Centos7 / Zimbra open source 8.6.0 GA Release with latest patch installed, most feature is working perfect but only smtp auth is not enable by port 25, I have already enable authentication + TLS only, but when I telnet the port 25 is no any SMTP AUTH message support, I also try google is not any document to mention how to enable this feature, please find my attached screenshot for reference.

Thanks !!!

[tayyabrao]

same problem here

[rizzz2pro]

Funny. I signed up 2 minutes ago to ask the same question. The first post is somebody asking it.

Same for me.

[ccelis5215]

same problem here

Hi,

What or which problem you want / need to solve?

The OP has showed the intented behaviour.

ccelis

[rizzz2pro]

Well there is no AUTH PLAIN or any AUTH lines in that screenshot he posted.

It should look something like this:

Code: Select all

esx2:~ ajcody$ telnet zcs723.EXAMPLE.com 25
Trying 10.137.27.32...
Connected to zcs723.EXAMPLE.com.
Escape character is '^]'.
220 zcs723.EXAMPLE.com ESMTP Postfix
helo myworkstation
250 zcs723.EXAMPLE.com
ehlo myworkstation
250-zcs723.EXAMPLE.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN

I'm not sure if the OP is having the exact same problem as I am but with my zimbra instance, I don't need to authenticate to send emails within the same domain.

If I telnet into my server I can email from CEO@mycompany.com to employee@mycompany.com without any credentials. But I cannot email from CEO@mycompany.com to guy@gmail.com. I need to force authentication to any domain and just like the OP, all the check boxes are enabled. What else is needed to force authentication permanently?

Thanks

[tayyabrao]

we need smtp authentication on local domain

thanks in advance for early response.

[phoenix]

we need smtp authentication on local domain

No you don't, your local (LAN users) should be using the correct Submission port which is 587 and that requires authentication to send mail.

[zsd]

Hello,

I'm facing the same issue, I'm able to send an email from user-1@mydomain.com to user-2@mydomain.com if I use the port 25 without any authentication.
Did you find a solution ?

BR,
Stéphane.

[phoenix]

I'm facing the same issue, I'm able to send an email from user-1@mydomain.com to user-2@mydomain.com if I use the port 25 without any authentication.
Did you find a solution ?

...erm, that's what a mail serrver is supposed to do. Your mail server will accept mail on Port 25 (the SMTP port) and deliver it to the intended recipient. If you set port 25 to require authentication then nobody on the internet will be able to send you any mail, think about it.

[dilipsingh556]

I'm facing the same issue, I'm able to send an email from user-1@mydomain.com to user-2@mydomain.com if I use the port 25 without any authentication.
Did you find a solution ?

...erm, that's what a mail serrver is supposed to do. Your mail server will accept mail on Port 25 (the SMTP port) and deliver it to the intended recipient. If you set port 25 to require authentication then nobody on the internet will be able to send you any mail, think about it.

But in this someone will telnet and send the email from CEO@domain.com to employee@domain.com locally without authentication. Also we cannot block the port 25 externally. Which will be then accessible from around the world and could telnet.