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Email server: security certificate for server is invalid or expired

Posted: Wed 8. May 2019, 18:51
by Nikitaidis
Hello

how can fix Email ssl server error: security certificate for server is invalid or expired.

in phone or mail app show error ... Email server ( hostname show ... ) Self-signed root certificate / Expires: Wednesday, 2 May 2029 at 19:46:16 Central European Summer Time.

but if i check SSL server name show Let's Encrypt Authority X3 not Self-signed root and Valid until Sat, 03 Aug 2019 19:32:07 UTC (expires in 2 months and 26 days) .

Re: Email server: security certificate for server is invalid or expired

Posted: Wed 8. May 2019, 19:38
by stfn116
you need to change this in the settings..

Go to Security > SSL/TLS Certificates > Secure Server services Button on the right... Then select the Lets Encrypt instead of the self-signed Cert!

Have fun !

Re: Email server: security certificate for server is invalid or expired

Posted: Wed 8. May 2019, 21:01
by Nikitaidis
stfn116 wrote: Wed 8. May 2019, 19:38 you need to change this in the settings..

Go to Security > SSL/TLS Certificates > Secure Server services Button on the right... Then select the Lets Encrypt instead of the self-signed Cert!

Have fun !
i try it and still same problem ... :!:

Re: Email server: security certificate for server is invalid or expired

Posted: Wed 8. May 2019, 21:48
by Martin
Hello,

the server hostname already resolves to your server? This is mandatory for receiving a Let's Encrypt Certificate for server hostname.

Re: Email server: security certificate for server is invalid or expired

Posted: Thu 9. May 2019, 00:42
by Nikitaidis
Martin wrote: Wed 8. May 2019, 21:48 Hello,

the server hostname already resolves to your server? This is mandatory for receiving a Let's Encrypt Certificate for server hostname.

i have already :
√ set hostname via ssh: hostnamectl set-hostname
√ Configuration / Hostname /
√ A record for subdomain hostname
√ yes hostname already resolves to ip server
√ from https://www.ssllabs.com/ i see ssl Overall Rating ( A )
Valid from Sun, 05 May 2019 19:32:07 UTC
Valid until Sat, 03 Aug 2019 19:32:07 UTC (expires in 2 months and 25 days)
Key RSA 4096 bits (e 65537)
Weak key (Debian) No
Issuer Let's Encrypt Authority X3
AIA: http://cert.int-x3.letsencrypt.org/

Re: Email server: security certificate for server is invalid or expired

Posted: Thu 9. May 2019, 07:19
by Alexander
Make sure, your mail client is using vps.bluecrystaleshop.com as mx server, not mail.vps.bluecrystaleshop.com or others.

(E.g. a test via https://www.checktls.com/TestReceiver seems correct.)

Re: Email server: security certificate for server is invalid or expired

Posted: Thu 9. May 2019, 12:53
by Nikitaidis
Alexander wrote: Thu 9. May 2019, 07:19 Make sure, your mail client is using vps.bluecrystaleshop.com as mx server, not mail.vps.bluecrystaleshop.com or others.

(E.g. a test via https://www.checktls.com/TestReceiver seems correct.)
thank you for your answer..
you mean :
@ 86400 MX vps.bluecrystaleshop.com
?

Re: Email server: security certificate for server is invalid or expired

Posted: Mon 20. May 2019, 21:47
by MLan
@ MX 10 11.bluecrystaleshop.com.

Re: Email server: security certificate for server is invalid or expired

Posted: Sat 2. Nov 2019, 15:46
by cenix102
Hello together

I have the same problem. I checked already the SSL/TLS Certificate config. Still the same problem.

Do you have a solution for this problem?

Thanks a lot for your help!