Splunk Enterprise
Highlighted

SSL: WRONG_VERSION_NUMBER when sending email

New Member

HI,

I am getting the following error when trying to send an email

command="sendemail", [SSL: WRONGVERSIONNUMBER] wrong version number (_ssl.c:741) while sending mail to

using the command
index=internal | head 1 | sendemail to="my email" from="domain email" format="html" server=smtp-relay.gmail.com:587 usessl=1

How can I fix this error?

Thanks

Tags (1)
0 Karma
Highlighted

Re: SSL: WRONG_VERSION_NUMBER when sending email

SplunkTrust
SplunkTrust

Hey,

take a look at the known issues. Search for SPL-138647, hope this helps.

Skalli

0 Karma
Highlighted

Re: SSL: WRONG_VERSION_NUMBER when sending email

New Member

Thanks Skalli,

After applying the config change and adding
[email]
sslVersions = *,-ssl2
cipherSuite = TLSv1+HIGH:TLSv1.2+HIGH:@STRENGTH

Got rid of that error now getting
command="sendemail", [SSL: UNKNOWNPROTOCOL] unknown protocol (ssl.c:741)

Running the below command returns the following

sudo ./splunk/bin/splunk cmd openssl sclient -connect smtp-relay.gmail.com:587 | awk '/Protocol/ || /Cipher/ || /Verify/'
140005157344960:error:140770FC:SSL routines:SSL23
GETSERVERHELLO:unknown protocol:s23_clnt.c:827:
New, (NONE), Cipher is (NONE)
Protocol : TLSv1.2
Cipher : 0000
Verify return code: 0 (ok)

The server has other applications successfully sending emails via the above mail server so I am missing something in the config.

0 Karma
Highlighted

Re: SSL: WRONG_VERSION_NUMBER when sending email

SplunkTrust
SplunkTrust

Hm, this seems weird. Are you using a certificate of your own CA (or Let's Encrypt)? Can you test that certificate (validate) and check if it's in the correct format? If you can not connct wiht openssl to that server, it's the certificate.

Skalli

0 Karma
Highlighted

Re: SSL: WRONG_VERSION_NUMBER when sending email

New Member

Hi Skalli,

It's not our certificate it's Google's certificate and as stated we have other applications installed (Jira, Confluence) that can successfully connect and send emails via the same mail server.

I am at a loss as well as I do not know why one application is working correctly and another is not. I may have to try a different mail server and see how I go.

Thanks.

0 Karma
Speak Up for Splunk Careers!

We want to better understand the impact Splunk experience and expertise has has on individuals' careers, and help highlight the growing demand for Splunk skills.