Re: IBM SMTP Sever SSL CA Issue

Pete Helgren <[email protected]> Thu, 16 Jul 2026 14:54:11 -0500
Newsgroups gmane.comp.hardware.ibm.midrange
Message-ID <[email protected]>
Might be that they don't have a clear understanding of a CA ROOT and 
intermediates.  I would have guessed that removing all but the cert 
assignment  would work if the CA cert was in the certificate store as well.

Interesting config...

Pete Helgren
www.petesworkshop.com
CISSP - MSCM
GIAC Cloud Penetration Tester
AWS Certified Cloud Practitioner
Microsoft Certified: Azure Fundamentals

On 7/16/2026 12:46 PM, Brad Stone wrote:
> I think I figured it out.  For some reason they had 5 different CAs
> assigned to the SMTP client application in DCM.  I removed all but the 2
> really needed and things seem to be flowing again.
>
> That's so weird.  I never assign CAs to a client application... they also
> have a certificate assigned to it for some reason too.  *shrug*
>
> On Thu, Jul 16, 2026 at 12:19 PM Brad Stone <[email protected]> wrote:
>
>> I am helping a customer with an email issue.  They are using the SPOOLMAIL
>> and apparently the emails are sent with the IBM SMTP server.
>>
>> when I use WRKSMTPEMM I see the emails as non deliverable.  I see in the
>> log this error:
>>
>> Secure socket init failed:6000(Certificate is not signed by a trusted
>> certificate authority.)
>>
>> I used openssl to get the certificate of the server and imported the
>> chain.  I stopped and restarted SMTP server and tried to resend.  Got the
>> same error.
>>
>> I also tried using MAILTOOL and turned on settings to not ignore "not
>> trusted" errors and have no issue there at all.  It's not complaining at
>> all.  It's using GSK APIs.. not sure what IBM is using.
>>
>> any ideas?
>>
>> Bradley V. Stone
>> www.bvstools.com
>> Native IBM i e-Mail solutions for Microsoft Office 365, Gmail, or any
>> Cloud Provider!
>>
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