Maximo

Hi All,

We are trying to configure the SMPT with an internal server using port 25, but we are getting the error message below. Do you have any idea what it could be?

To test the connectivity between the cluster and the SMTP server, I opened the terminal in one of the pods and ran the command curl -vv telnet://DestinationServerName:25 and I got a successfully connected message. 

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If this post helps, please consider accepting it as a solution to help other members find it more quickly.

Maycon Belfort
Consultant
BPD Zenith
Melbourne
------------------------------

Hi Maycon,

just quickly googling the error it seems like it's related to the SMTP server setup itself. 
You didn't mention what is the server that you're trying to connect to but I would recommend further investigating SMTP server logs as the network connectivity is clearly OK.

I'm not sure what is your use case with connecting to the internal SMTP server but if you need one for testing only then what I typically do is that I'm deploying mail-trap ("fake") SMTP server directly to the OCP cluster (e.g. MailCatcher or MailHog). This way nothing really goes out of OCP and yet I can test e-mail functionality, viewing trapped e-mails in the web browser.

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Andrzej Więcław
Maximo Technical Consultant
AFRY
Wrocław, Poland
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Original Message:
Sent: Wed July 24, 2024 07:56 PM
From: Maycon Belfort
Subject: MAS SMTP configuration fails

Hi All,

We are trying to configure the SMPT with an internal server using port 25, but we are getting the error message below. Do you have any idea what it could be?

To test the connectivity between the cluster and the SMTP server, I opened the terminal in one of the pods and ran the command curl -vv telnet://DestinationServerName:25 and I got a successfully connected message. 

------------------------------
If this post helps, please consider accepting it as a solution to help other members find it more quickly.

Maycon Belfort
Consultant
BPD Zenith
Melbourne
------------------------------

Hi Maycon,

can You turn on the developer tools in Your browser (usually by clicking F12) and check what is the actual response from Core API? It sometimes shows something useful. Second step would be to check the coreapi pod logs. By default there are 3 of them so You would need to take a look in each.

Regards,

------------------------------
Witold Wierzchowski
------------------------------

Original Message:
Sent: Wed July 24, 2024 07:56 PM
From: Maycon Belfort
Subject: MAS SMTP configuration fails

Hi All,

We are trying to configure the SMPT with an internal server using port 25, but we are getting the error message below. Do you have any idea what it could be?

To test the connectivity between the cluster and the SMTP server, I opened the terminal in one of the pods and ran the command curl -vv telnet://DestinationServerName:25 and I got a successfully connected message. 

------------------------------
If this post helps, please consider accepting it as a solution to help other members find it more quickly.

Maycon Belfort
Consultant
BPD Zenith
Melbourne
------------------------------

Thank you, Andrzej and Witold.

Those are excellent troubleshooting ideas. In the end, the problem was the client network firewall blocking the OpenShift IP, which, after being whitelisted, worked.

Thank you!

------------------------------
If this post helps, please consider accepting it as a solution to help other members find it more quickly.

Maycon Belfort
Consultant
BPD Zenith
Melbourne
------------------------------

Original Message:
Sent: Thu July 25, 2024 02:21 AM
From: Witold Wierzchowski
Subject: MAS SMTP configuration fails

Hi Maycon,

can You turn on the developer tools in Your browser (usually by clicking F12) and check what is the actual response from Core API? It sometimes shows something useful. Second step would be to check the coreapi pod logs. By default there are 3 of them so You would need to take a look in each.

Regards,

------------------------------
Witold Wierzchowski

Original Message:
Sent: Wed July 24, 2024 07:56 PM
From: Maycon Belfort
Subject: MAS SMTP configuration fails

Hi All,

We are trying to configure the SMPT with an internal server using port 25, but we are getting the error message below. Do you have any idea what it could be?

To test the connectivity between the cluster and the SMTP server, I opened the terminal in one of the pods and ran the command curl -vv telnet://DestinationServerName:25 and I got a successfully connected message. 

------------------------------
If this post helps, please consider accepting it as a solution to help other members find it more quickly.

Maycon Belfort
Consultant
BPD Zenith
Melbourne
------------------------------