[Virtualmin] Samsung email client on my Android phone rejects Let's Encrypt SSL certificates installed on Dovecot and Postfix after server migration

Virtualmin
1
SYSTEM INFORMATION
OS type and version REQUIRED
Webmin version REQUIRED
Virtualmin version REQUIRED
Related packages SUGGESTED

Subject: [Virtualmin] Samsung email client on my Android phone rejects Let’s Encrypt SSL certificates installed on Dovecot and Postfix after server migration

Good day from Singapore,

I have actually installed Thunderbird email client on my Windows 10 laptop and it DOES NOT complain about Let’s Encrypt SSL certificates installed on Dovecot and Postfix after server migration.

However, when I try to add email accounts using Samsung email client on my Android phone, it rejects Let’s Encrypt SSL certificates installed on Dovecot and Postfix after server migration, and email messages refuse to sync.

It’s only when I choose SSL (Accept all certificates) and TLS (Accept all certificates) in Server Settings in Samsung email client, that email messages start to sync.

What could be the cause of the problem?

I am trying to resolve the issue on 2 affected domain names.

teo-en-ming.com

teo-en-ming-corp.com

When I try to run SSL Checker at SSL Checker against mail.teo-en-ming-corp.com:993, it says:

“The certificate is not trusted in all web browsers. You may need to install an Intermediate/chain certificate to link it to a trusted root certificate. Learn more about this error. The fastest way to fix this problem is to contact your SSL provider.”

IMAP SSL Server uses port 993.

Please advise.

Thank you very much.

Regards,

Mr. Turritopsis Dohrnii Teo En Ming
Singapore

2

Good Day from New York State,

I’ve occasionally gotten flaky results from SSL Checker. I suggest trying

and going from there.

The CA certificate should be installed by default if you requested the SSL certificate through Virtualmin.

Richard

3

The problem may be that those Samsung devices are outdated (i.e. have outdated CA certificates). If so, this is not Virtualmin issue or something we can fix.

4

Hi,

I think the problem with the intermediate CA certificate resolved on its own. Samsung email client and Microsoft Outlook on my Samsung Galaxy A32 5G Android phone no longer complained about invalid SSL certificates.

I wonder how Virtualmin fixed the issue automatically.

Regards,

Mr. Turritopsis Dohrnii Teo En Ming
Singapore

5

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.