C310 email setup with SSL/TLS fails

[TammyL-Xerox]

Hello joost, 

Please use this link to find a local dealer in your area for more support with this. 

[joost]

Hi TammyL,

Thanks for your reply.

My private mailserver uses Let'sEncrypt SSL certificates, Google has it's own certificate issuer (GTS).

How I know that SSL with mail works is that the client (the printer in this case) must validate the mailserver certificate with the locally stored root certificates. All operating systems have a (sort of fixed) set of root certificates installed by default. Google and Let'sEncrypt nowedays are part of these. So when contacting a SMTP server with your macOS, Windows, Linux or BSD box will validate correctly.

As far as I know the client certificate (the certificate the printer uses to connect to outside) is irrelevant here. Eg. your Windows box won't even have a client certificate.

I would expect that with the current firmware, the default set of root certificates were ommitted? That way the SMTP server certificate can't be validated.

Before reporting I had already added the Let'sEncrypt root certificates to the "Manage CA Certificates" section. But SMTP over SSL still fails.

Since I'm based in Europe, it's not an option to call US support.

[asifnaveed8527]

Thanks for sharing those articles, TammyL. I've had similar issues with my C310 setup and will definitely try these steps. Joost, hope it resolves your issue too. Fingers crossed! 🤞🏼

[TammyL-Xerox]

Hello joost, 

Here are a couple of articles for you to take a look at that may help with this issue.  

Manage Certificates

Install Certificates

If you are still having issues after trying these steps, I suggest that you call into our support department for assistance @ 1-800-821-2797.

[joost]

After updadating our device to the newest firmware (CSNZJ.081.215) our Email Alert Setup to a server using SMTP with SSL/TLS fails with the following error: 

! Require Trusted Certificate Failed (71)

Full (anonimized) maillog below.

Now, the email setup only works when you disable SSL/TLS.

On the previous firmware (forgot which version) SSL worked fine.

Tested with company SMTP server and Google SMTP.

Any suggestions on how to solve this?

The lastmaillog:

08-11 09:29:26 - Resolve <smtp.host.name>
08-11 09:29:26 > Connecting to a.b.c.d : 25
08-11 09:29:26 < Connection Established
08-11 09:29:26 > EHLO <printer.host.name>
08-11 09:29:26 < 250-<smtp.host.name> Hello <printer.host.name> [e.f.g.h]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-PIPECONNECT
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP
08-11 09:29:26 > STARTTLS
08-11 09:29:26 < 220 TLS go ahead
08-11 09:29:26 - Starting SSL Session
08-11 09:29:26 ! Require Trusted Certificate Failed (71)
08-11 09:29:26 > QUIT
08-11 09:29:27 < 221 <smtp.host.name> closing connection